diff --git a/server/data/summaries.py b/server/data/summaries.py
index a15f659..f8fce28 100644
--- a/server/data/summaries.py
+++ b/server/data/summaries.py
@@ -202,6 +202,9 @@ def _summaries_for_contact(
         related_name_sets = list(
             self._names_provider.get_related_names(contact.first_name)
         )
+        # No related names? Just use the first name.
+        if not related_name_sets:
+            related_name_sets = [frozenset([contact.first_name])]
         with sao.Session(self._engine) as session:
             for related_name_set in related_name_sets:
                 stmt = self._contact_stmt(contact, related_name_set)