diff --git a/pkg/doc/did/doc.go b/pkg/doc/did/doc.go
index 69f7c8cd6..1b7d5b46f 100644
--- a/pkg/doc/did/doc.go
+++ b/pkg/doc/did/doc.go
@@ -263,6 +263,7 @@ func ParseDocumentResolution(data []byte) (*DocResolution, error) {
 type Doc struct {
 	Context              []string
 	ID                   string
+	AlsoKnownAs          []string
 	VerificationMethod   []VerificationMethod
 	Service              []Service
 	Authentication       []Verification
@@ -428,6 +429,7 @@ func NewReferencedVerification(vm *VerificationMethod, r VerificationRelationshi
 type rawDoc struct {
 	Context              interface{}              `json:"@context,omitempty"`
 	ID                   string                   `json:"id,omitempty"`
+	AlsoKnownAs          []interface{}            `json:"alsoKnownAs,omitempty"`
 	VerificationMethod   []map[string]interface{} `json:"verificationMethod,omitempty"`
 	PublicKey            []map[string]interface{} `json:"publicKey,omitempty"`
 	Service              []map[string]interface{} `json:"service,omitempty"`
@@ -489,9 +491,10 @@ func ParseDocument(data []byte) (*Doc, error) {
 	}
 
 	doc := &Doc{
-		ID:      raw.ID,
-		Created: raw.Created,
-		Updated: raw.Updated,
+		ID:          raw.ID,
+		AlsoKnownAs: stringArray(raw.AlsoKnownAs),
+		Created:     raw.Created,
+		Updated:     raw.Updated,
 	}
 
 	context, baseURI := parseContext(raw.Context)
@@ -1114,6 +1117,8 @@ func (doc *Doc) JSONBytes() ([]byte, error) {
 		context = doc.Context[0]
 	}
 
+	aka := populateRawAlsoKnownAs(doc.AlsoKnownAs)
+
 	vm, err := populateRawVM(context, doc.ID, doc.processingMeta.baseURI, doc.VerificationMethod)
 	if err != nil {
 		return nil, fmt.Errorf("JSON unmarshalling of Verification Method failed: %w", err)
@@ -1148,7 +1153,7 @@ func (doc *Doc) JSONBytes() ([]byte, error) {
 	}
 
 	raw := &rawDoc{
-		Context: doc.Context, ID: doc.ID, VerificationMethod: vm,
+		Context: doc.Context, ID: doc.ID, AlsoKnownAs: aka, VerificationMethod: vm,
 		Authentication: auths, AssertionMethod: assertionMethods, CapabilityDelegation: capabilityDelegations,
 		CapabilityInvocation: capabilityInvocations, KeyAgreement: keyAgreements,
 		Service: populateRawServices(doc.Service, doc.ID, doc.processingMeta.baseURI), Created: doc.Created,
@@ -1395,6 +1400,16 @@ func populateRawServices(services []Service, didID, baseURI string) []map[string
 	return rawServices
 }
 
+func populateRawAlsoKnownAs(aka []string) []interface{} {
+	rawAka := make([]interface{}, len(aka))
+
+	for i, v := range aka {
+		rawAka[i] = v
+	}
+
+	return rawAka
+}
+
 func populateRawVM(context, didID, baseURI string, pks []VerificationMethod) ([]map[string]interface{}, error) {
 	var rawVM []map[string]interface{}
 
diff --git a/pkg/doc/did/doc_test.go b/pkg/doc/did/doc_test.go
index 2a30f0127..e73379033 100644
--- a/pkg/doc/did/doc_test.go
+++ b/pkg/doc/did/doc_test.go
@@ -89,6 +89,10 @@ func TestValidWithDocBase(t *testing.T) {
 		// test doc id
 		require.Equal(t, doc.ID, "did:example:123456789abcdefghi")
 
+		// test alsoKnownAs
+		require.Equal(t, 1, len(doc.AlsoKnownAs))
+		require.Equal(t, "did:example:123", doc.AlsoKnownAs[0])
+
 		hexDecodeValue, err := hex.DecodeString("02b97c30de767f084ce3080168ee293053ba33b235d7116a3263d29f1450936b71")
 		block, _ := pem.Decode([]byte(pemPK))
 		require.NotNil(t, block)
@@ -175,6 +179,8 @@ func TestDocResolution(t *testing.T) {
 		require.Equal(t, 1, len(d.Context))
 		require.Equal(t, "https://w3id.org/did-resolution/v1", d.Context[0])
 		require.Equal(t, "did:example:21tDAKCERh95uGgKbJNHYp", d.DIDDocument.ID)
+		require.Equal(t, 1, len(d.DIDDocument.AlsoKnownAs))
+		require.Equal(t, "did:example:123", d.DIDDocument.AlsoKnownAs[0])
 		require.Equal(t, true, d.DocumentMetadata.Method.Published)
 		require.Equal(t, "did:ex:123333", d.DocumentMetadata.CanonicalID)
 
@@ -187,6 +193,8 @@ func TestDocResolution(t *testing.T) {
 		require.Equal(t, 1, len(d.Context))
 		require.Equal(t, "https://w3id.org/did-resolution/v1", d.Context[0])
 		require.Equal(t, "did:example:21tDAKCERh95uGgKbJNHYp", d.DIDDocument.ID)
+		require.Equal(t, 1, len(d.DIDDocument.AlsoKnownAs))
+		require.Equal(t, "did:example:123", d.DIDDocument.AlsoKnownAs[0])
 		require.Equal(t, true, d.DocumentMetadata.Method.Published)
 		require.Equal(t, "did:ex:123333", d.DocumentMetadata.CanonicalID)
 	})
@@ -209,6 +217,10 @@ func TestValid(t *testing.T) {
 		// test doc id
 		require.Equal(t, doc.ID, "did:example:21tDAKCERh95uGgKbJNHYp")
 
+		// test alsoKnownAs
+		require.Equal(t, 1, len(doc.AlsoKnownAs))
+		require.Equal(t, "did:example:123", doc.AlsoKnownAs[0])
+
 		hexDecodeValue, err := hex.DecodeString("02b97c30de767f084ce3080168ee293053ba33b235d7116a3263d29f1450936b71")
 		block, _ := pem.Decode([]byte(pemPK))
 		require.NotNil(t, block)
@@ -561,6 +573,96 @@ func TestValidateDidDocID(t *testing.T) {
 	})
 }
 
+func TestValidateDidDocAlsoKnownAs(t *testing.T) {
+	t.Run("test did doc with duplicate alsoKnownAs entries", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		for _, d := range docs {
+			raw := &rawDoc{}
+			require.NoError(t, json.Unmarshal([]byte(d), &raw))
+			raw.AlsoKnownAs = []interface{}{"did:example:123", "did:example:123"}
+			bytes, err := json.Marshal(raw)
+			require.NoError(t, err)
+			err = validate(bytes, raw.schemaLoader())
+			require.Error(t, err)
+			require.Contains(t, err.Error(), "must be unique")
+		}
+	})
+
+	t.Run("test did doc with non-uri alsoKnownAs string", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		for _, d := range docs {
+			raw := &rawDoc{}
+			require.NoError(t, json.Unmarshal([]byte(d), &raw))
+			raw.AlsoKnownAs = []interface{}{"not.a.valid.uri"}
+			bytes, err := json.Marshal(raw)
+			require.NoError(t, err)
+			err = validate(bytes, raw.schemaLoader())
+			require.Error(t, err)
+			require.Contains(t, err.Error(), "Does not match format 'uri'")
+		}
+	})
+
+	t.Run("test did doc with non-string alsoKnownAs entry", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		for _, d := range docs {
+			raw := &rawDoc{}
+			require.NoError(t, json.Unmarshal([]byte(d), &raw))
+			raw.AlsoKnownAs = []interface{}{0}
+			bytes, err := json.Marshal(raw)
+			require.NoError(t, err)
+			err = validate(bytes, raw.schemaLoader())
+			require.Error(t, err)
+			require.Contains(t, err.Error(), "Invalid type. Expected: string")
+		}
+	})
+
+	t.Run("test did doc with empty alsoKnownAs", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		for _, d := range docs {
+			raw := &rawDoc{}
+			require.NoError(t, json.Unmarshal([]byte(d), &raw))
+			raw.AlsoKnownAs = nil
+			bytes, err := json.Marshal(raw)
+			require.NoError(t, err)
+			err = validate(bytes, raw.schemaLoader())
+			require.NoError(t, err)
+		}
+	})
+
+	t.Run("test did doc with zero-length alsoKnownAs", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		for _, d := range docs {
+			raw := &rawDoc{}
+			require.NoError(t, json.Unmarshal([]byte(d), &raw))
+			raw.AlsoKnownAs = []interface{}{}
+			bytes, err := json.Marshal(raw)
+			require.NoError(t, err)
+			err = validate(bytes, raw.schemaLoader())
+			require.NoError(t, err)
+		}
+	})
+
+	t.Run("test did doc with valid alsoKnownAs entries", func(t *testing.T) {
+		docs := []string{validDoc, validDocV011}
+		valid := []interface{}{
+			"did:example:123",
+			"https://social.example/username",
+			"urn:uuid:1231",
+		}
+		for _, d := range docs {
+			for _, aka := range valid {
+				raw := &rawDoc{}
+				require.NoError(t, json.Unmarshal([]byte(d), &raw))
+				raw.AlsoKnownAs = []interface{}{aka}
+				bytes, err := json.Marshal(raw)
+				require.NoError(t, err)
+				err = validate(bytes, raw.schemaLoader())
+				require.NoError(t, err)
+			}
+		}
+	})
+}
+
 func TestValidateDidDocPublicKey(t *testing.T) {
 	t.Run("test did doc with empty public key", func(t *testing.T) {
 		docs := []string{validDoc, validDocV011}
@@ -1498,20 +1600,20 @@ func TestDIDSchemas(t *testing.T) {
 				didStr: `{
         "@context": "https://w3id.org/did/v0.11",
         "id": "did:w123:world",
-        "assertionMethod": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN", 
-		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A", 
-		"did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw", 
+        "assertionMethod": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN",
+		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
+		"did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
 		"did:w123:world#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"],
-        "authentication": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN", "", 
-		"did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",  
+        "authentication": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN", "",
+		"did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
 		"did:w123:world#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"],
-        "capabilityDelegation": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN", 
-		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A", 
-		 "did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw", 
+        "capabilityDelegation": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN",
+		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
+		 "did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
 		 "did:w123:world#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"],
-        "capabilityInvocation": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN", 
-		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A", 
-		 "did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw", 
+        "capabilityInvocation": ["did:w123:world#z6MksHh7qHWvybLg5QTPPdG2DgEjjduBDArV9EF9mRiRzMBN",
+		"did:w123:world#_Qq0UL2Fq651Q0Fjd6TvnYE-faHiOpRlPVQcY_-tA4A",
+		 "did:w123:world#_TKzHv2jFIyvdTGF1Dsgwngfdg3SH6TpDv0Ta1aOEkw",
 		 "did:w123:world#NjQ6Y_ZMj6IUK_XkgCDwtKHlNTUTVjEYOWZtxhp1n-E"],
         "keyAgreement": [{
             "id": "did:w123:world#zC5iai1sL93gQxn8LKh1i42fTbpfar65dVx4NYznYfG3Y5",
diff --git a/pkg/doc/did/schema.go b/pkg/doc/did/schema.go
index 10a6c298c..ca7b0de90 100644
--- a/pkg/doc/did/schema.go
+++ b/pkg/doc/did/schema.go
@@ -44,6 +44,14 @@ const (
     "id": {
       "type": "string"
     },
+    "alsoKnownAs": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "format": "uri"
+      },
+      "uniqueItems": true
+    },
     "publicKey": {
       "type": "array",
       "items": {
@@ -219,6 +227,14 @@ const (
     "id": {
       "type": "string"
     },
+    "alsoKnownAs": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "format": "uri"
+      },
+      "uniqueItems": true
+    },
     "publicKey": {
       "type": "array",
       "items": {
@@ -406,6 +422,14 @@ const (
     "id": {
       "type": "string"
     },
+    "alsoKnownAs": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "format": "uri"
+      },
+      "uniqueItems": true
+    },
     "publicKey": {
       "type": "array",
       "items": {
diff --git a/pkg/doc/did/testdata/valid_doc.jsonld b/pkg/doc/did/testdata/valid_doc.jsonld
index 26ca510b0..3b35c5dae 100644
--- a/pkg/doc/did/testdata/valid_doc.jsonld
+++ b/pkg/doc/did/testdata/valid_doc.jsonld
@@ -1,6 +1,9 @@
 {
   "@context": ["https://www.w3.org/ns/did/v1"],
   "id": "did:example:21tDAKCERh95uGgKbJNHYp",
+  "alsoKnownAs": [
+    "did:example:123"
+  ],
   "verificationMethod": [
     {
       "id": "did:example:123456789abcdefghi#keys-1",
diff --git a/pkg/doc/did/testdata/valid_doc_resolution.jsonld b/pkg/doc/did/testdata/valid_doc_resolution.jsonld
index 20a0656a1..45e28491c 100644
--- a/pkg/doc/did/testdata/valid_doc_resolution.jsonld
+++ b/pkg/doc/did/testdata/valid_doc_resolution.jsonld
@@ -5,6 +5,9 @@
       "https://w3id.org/did/v1"
     ],
     "id": "did:example:21tDAKCERh95uGgKbJNHYp",
+    "alsoKnownAs": [
+      "did:example:123"
+    ],
     "verificationMethod": [
       {
         "id": "did:example:123456789abcdefghi#keys-1",
diff --git a/pkg/doc/did/testdata/valid_doc_v0.11.jsonld b/pkg/doc/did/testdata/valid_doc_v0.11.jsonld
index e9b46214b..e3734001e 100644
--- a/pkg/doc/did/testdata/valid_doc_v0.11.jsonld
+++ b/pkg/doc/did/testdata/valid_doc_v0.11.jsonld
@@ -1,6 +1,9 @@
 {
   "@context": ["https://w3id.org/did/v0.11"],
   "id": "did:example:21tDAKCERh95uGgKbJNHYp",
+  "alsoKnownAs": [
+    "did:example:123"
+  ],
   "publicKey": [
     {
       "id": "did:example:123456789abcdefghi#keys-1",
diff --git a/pkg/doc/did/testdata/valid_doc_with_base.jsonld b/pkg/doc/did/testdata/valid_doc_with_base.jsonld
index a2c73b344..bf6f8662c 100644
--- a/pkg/doc/did/testdata/valid_doc_with_base.jsonld
+++ b/pkg/doc/did/testdata/valid_doc_with_base.jsonld
@@ -2,6 +2,9 @@
   "@context": ["https://www.w3.org/ns/did/v1",
    { "@base": "did:example:123456789abcdefghi"}],
   "id": "did:example:123456789abcdefghi",
+  "alsoKnownAs": [
+    "did:example:123"
+  ],
   "verificationMethod": [
     {
       "id": "#keys-1",