diff --git a/chalicelib/api/members.py b/chalicelib/api/members.py
index 57b3f32..37734f9 100644
--- a/chalicelib/api/members.py
+++ b/chalicelib/api/members.py
@@ -64,3 +64,9 @@ def delete_members():
 def update_member_roles(user_id):
     data = members_api.current_request.json_body
     return member_service.update_roles(user_id, data["roles"])
+
+
+@members_api.route("/members/family-tree", methods=["GET"], cors=True)
+@auth(members_api, roles=[Roles.MEMBER])
+def get_family_tree():
+    return member_service.get_family_tree()
diff --git a/chalicelib/services/MemberService.py b/chalicelib/services/MemberService.py
index c5f8943..91297e3 100644
--- a/chalicelib/services/MemberService.py
+++ b/chalicelib/services/MemberService.py
@@ -2,6 +2,7 @@
 from chalice import ConflictError, NotFoundError, UnauthorizedError
 
 from bson import ObjectId
+from collections import defaultdict
 import json
 import jwt
 import boto3
@@ -118,5 +119,19 @@ def update_roles(self, document_id=str, roles=list) -> bool:
             [{"$set": {"roles": roles}}],
         )
 
+    def get_family_tree(self):
+        data = mongo_module.get_data_from_collection(self.collection)
+
+        # Group by family
+        family_groups = defaultdict(list)
+
+        for member in data:
+            if "big" not in member or member["big"] == "":
+                continue
+            member["_id"] = str(member["_id"])
+            family_groups[member["family"]].append(member)
+
+        return family_groups
+
 
 member_service = MemberService()