diff --git a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Controller.kt b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Controller.kt
index c388fdc..cd9e4e6 100644
--- a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Controller.kt
+++ b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Controller.kt
@@ -21,6 +21,8 @@ class Controller {
     lateinit var tutorRepository: TutorRepository
     @Autowired
     lateinit var observationRepository: ObservationRepository
+    @Autowired
+    lateinit var personRepository: PersonRepository
 
     /**
      * Returns a list of all current sites.
@@ -100,7 +102,9 @@ class Controller {
             knowledge = overallScores[RatingCategory.KNOWLEDGE],
             entries = newObservation.entries,
             tutors = tutors,
-            persons = newObservation.persons.asSequence().map { Person(it.toUpperCase()) }.toSet()
+            persons = newObservation.persons.asSequence().map {
+                personRepository.findByName(it.toUpperCase()) ?: personRepository.save(Person(name = it.toUpperCase()))
+            }.toSet()
         )
         observation = observationRepository.save(observation)
         tutors.forEach {
diff --git a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Entity.kt b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Entity.kt
index 5fe2370..a18fb62 100644
--- a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Entity.kt
+++ b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Entity.kt
@@ -93,7 +93,7 @@ data class Observation(
     @JsonIgnore
     @ManyToMany(mappedBy = "observations")
     val tutors: Set<Tutor>,
-    @ElementCollection
+    @ManyToMany
     val persons: Set<Person>
 )
 
@@ -116,8 +116,11 @@ data class Entry(
     val improvements: String
 )
 
-@Embeddable
+@Entity
 data class Person(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
     @JsonProperty
     val name: String
 )
\ No newline at end of file
diff --git a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Repository.kt b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Repository.kt
index d5c9489..66b3255 100644
--- a/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Repository.kt
+++ b/backend/src/main/kotlin/uk/co/neviyn/observationdatabase/Repository.kt
@@ -1,7 +1,6 @@
 package uk.co.neviyn.observationdatabase
 
 import org.joda.time.LocalDate
-import org.springframework.data.jpa.repository.JpaSpecificationExecutor
 import org.springframework.data.repository.CrudRepository
 import org.springframework.stereotype.Repository
 
@@ -12,7 +11,7 @@ interface SiteRepository : CrudRepository<Site, Long>
 interface TutorRepository : CrudRepository<Tutor, Long>
 
 @Repository
-interface ObservationRepository : CrudRepository<Observation, Long>, JpaSpecificationExecutor<Observation> {
+interface ObservationRepository : CrudRepository<Observation, Long> {
 
     fun findBySiteAndDateBetween(site: Site, startDate: LocalDate, endDate: LocalDate): List<Observation>
 
@@ -21,4 +20,13 @@ interface ObservationRepository : CrudRepository<Observation, Long>, JpaSpecific
     fun findBySiteAndWhomAndDateBetween(site: Site, whom: String, startDate: LocalDate, endDate: LocalDate): List<Observation>
 
     fun findByTutorsAndWhomAndDateBetween(tutor: Tutor, whom: String, startDate: LocalDate, endDate: LocalDate): List<Observation>
+
+    fun findBySiteAndPersonsAndDateBetween(site: Site, person: Person, startDate: LocalDate, endDate: LocalDate): List<Observation>
+}
+
+@Repository
+interface PersonRepository : CrudRepository<Person, Long> {
+
+    fun findByName(name: String): Person?
+
 }
\ No newline at end of file
diff --git a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/RepositoryTest.kt b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/RepositoryTest.kt
index 62acc82..aa4b4fb 100644
--- a/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/RepositoryTest.kt
+++ b/backend/src/test/kotlin/uk/co/neviyn/observationdatabase/RepositoryTest.kt
@@ -19,6 +19,9 @@ class RepositoryTest {
     @Autowired
     lateinit var observationRepository: ObservationRepository
 
+    @Autowired
+    lateinit var personRepository: PersonRepository
+
     @Test
     fun testFindBySiteAndDateBetween_EmptyRepository() {
         val result = observationRepository.findBySiteAndDateBetween(Site(1, "x"), LocalDate.now(), LocalDate.now())
@@ -46,25 +49,26 @@ class RepositoryTest {
     @Test
     fun testFindBySiteAndDateBetween() {
         val correctSite = entityManager.persist(Site(name = "Correct"))
+        val person = entityManager.persist(Person(name = "Foo Bar"))
         val incorrectSite = entityManager.persist(Site(name = "Incorrect"))
         val tutor = entityManager.persist(Tutor(name = "X", site = correctSite))
         val tutor2 = entityManager.persist(Tutor(name = "N", site = incorrectSite))
         val tooEarly = Observation(site = correctSite, date = LocalDate.now().minusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         val tooLate = Observation(site = correctSite, date = LocalDate.now().plusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         val wrongSite = Observation(site = incorrectSite, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor2), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor2), persons = setOf(person))
         val justRight = Observation(site = correctSite, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         entityManager.persist(tooEarly)
         entityManager.persist(tooLate)
         entityManager.persist(wrongSite)
@@ -78,28 +82,29 @@ class RepositoryTest {
     fun testFindBySiteAndWhomAndDateBetween() {
         val correctSite = entityManager.persist(Site(name = "Correct"))
         val incorrectSite = entityManager.persist(Site(name = "Incorrect"))
+        val person = entityManager.persist(Person(name = "Foo Bar"))
         val tutor = entityManager.persist(Tutor(name = "X", site = correctSite))
         val tutor2 = entityManager.persist(Tutor(name = "N", site = incorrectSite))
         val tooEarly = Observation(site = correctSite, date = LocalDate.now().minusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         val tooLate = Observation(site = correctSite, date = LocalDate.now().plusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         val wrongSite = Observation(site = incorrectSite, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor2), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor2), persons = setOf(person))
         val justRight = Observation(site = correctSite, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         val wrongWhom = Observation(site = correctSite, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G2", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
         entityManager.persist(tooEarly)
         entityManager.persist(tooLate)
         entityManager.persist(wrongSite)
@@ -113,28 +118,29 @@ class RepositoryTest {
     @Test
     fun testFindByTutorsAndDateBetween() {
         val site = entityManager.persist(Site(name = "Correct"))
+        val person = entityManager.persist(Person(name = "Foo Bar"))
         val correctTutor = entityManager.persist(Tutor(name = "X", site = site))
         val incorrectTutor = entityManager.persist(Tutor(name = "N", site = site))
         val tooEarly = Observation(site = site, date = LocalDate.now().minusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val tooLate = Observation(site = site, date = LocalDate.now().plusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val wrongTutor = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(incorrectTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(incorrectTutor), persons = setOf(person))
         val justRight = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val justRightMultipleTutors = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor, incorrectTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor, incorrectTutor), persons = setOf(person))
         entityManager.persist(tooEarly)
         entityManager.persist(tooLate)
         entityManager.persist(wrongTutor)
@@ -154,32 +160,33 @@ class RepositoryTest {
     @Test
     fun testFindByTutorsAndWhomAndDateBetween() {
         val site = entityManager.persist(Site(name = "Correct"))
+        val person = entityManager.persist(Person(name = "Foo Bar"))
         val correctTutor = entityManager.persist(Tutor(name = "X", site = site))
         val incorrectTutor = entityManager.persist(Tutor(name = "N", site = site))
         val tooEarly = Observation(site = site, date = LocalDate.now().minusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val tooLate = Observation(site = site, date = LocalDate.now().plusDays(5),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val wrongTutor = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(incorrectTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(incorrectTutor), persons = setOf(person))
         val justRight = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val wrongGroup = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G2", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor), persons = setOf(person))
         val justRightMultipleTutors = Observation(site = site, date = LocalDate.now(),
             type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
             control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
-            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor, incorrectTutor), persons = setOf(Person("Foo Bar")))
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(correctTutor, incorrectTutor), persons = setOf(person))
         entityManager.persist(tooEarly)
         entityManager.persist(tooLate)
         entityManager.persist(wrongTutor)
@@ -197,4 +204,58 @@ class RepositoryTest {
         assertFalse(result.contains(wrongTutor))
         assertFalse(result.contains(wrongGroup))
     }
+
+    @Test
+    fun testFindBySiteAndPersonsAndDateBetween() {
+        val person = entityManager.persist(Person(name = "Foo Bar"))
+        val otherPerson = entityManager.persist(Person(name = "Wrong"))
+        val site = entityManager.persist(Site(name = "Incorrect"))
+        val tutor = entityManager.persist(Tutor(name = "X", site = site))
+        val tooEarly = Observation(site = site, date = LocalDate.now().minusDays(5),
+            type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
+            control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
+        val tooLate = Observation(site = site, date = LocalDate.now().plusDays(5),
+            type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
+            control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
+        val wrongPerson = Observation(site = site, date = LocalDate.now(),
+            type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
+            control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(otherPerson))
+        val justRight = Observation(site = site, date = LocalDate.now(),
+            type = TrainingType.INITIAL, observed = "1", whom = "G1", monitoring = 5.0, controlProcedural = 3.0,
+            control = 4.0, conservatism = 3.0, teamworkCommunications = 2.0, teamworkLeadership = 3.0,
+            teamworkWorkload = 1.0, knowledge = 1.0, entries = listOf(), tutors = setOf(tutor), persons = setOf(person))
+        entityManager.persist(tooEarly)
+        entityManager.persist(tooLate)
+        entityManager.persist(wrongPerson)
+        entityManager.persist(justRight)
+        val result = observationRepository.findBySiteAndPersonsAndDateBetween(site = site, person = person, startDate = LocalDate.now().minusDays(1), endDate = LocalDate.now().plusDays(1))
+        assertEquals(1, result.size)
+        assertEquals(justRight, result.first())
+    }
+
+    @Test
+    fun testFindPersonByName() {
+        val person = entityManager.persist(Person(name = "Foo Bar"))
+        entityManager.persist(person)
+        val result = personRepository.findByName("Foo Bar")
+        assertEquals(person, result)
+    }
+
+    @Test
+    fun testFindPersonByName_IncorrectName() {
+        val person = entityManager.persist(Person(name = "Foo Bar"))
+        entityManager.persist(person)
+        val result = personRepository.findByName("Foo")
+        assertNotSame(person, result)
+        assertNull(result)
+    }
+
+    @Test
+    fun testFindPersonByName_NoPersons() {
+        val result = personRepository.findByName("Foo")
+        assertNull(result)
+    }
 }
\ No newline at end of file