diff --git a/social_core/pipeline/__init__.py b/social_core/pipeline/__init__.py
index 5ff422be..2d996932 100644
--- a/social_core/pipeline/__init__.py
+++ b/social_core/pipeline/__init__.py
@@ -4,6 +4,8 @@
     # already part of the auth response from the provider, but sometimes this
     # could hit a provider API.
     "social_core.pipeline.social_auth.social_details",
+    # Populate first+last name from full name and vice-versa, if needed
+    'social_core.pipeline.social_auth.social_names',
     # Get the social uid from whichever service we're authing thru. The uid is
     # the unique identifier of the given user in the provider.
     "social_core.pipeline.social_auth.social_uid",
diff --git a/social_core/pipeline/social_auth.py b/social_core/pipeline/social_auth.py
index 1c5940e7..8159edd7 100644
--- a/social_core/pipeline/social_auth.py
+++ b/social_core/pipeline/social_auth.py
@@ -5,6 +5,21 @@ def social_details(backend, details, response, *args, **kwargs):
     return {"details": dict(backend.get_user_details(response), **details)}
 
 
+def social_names(backend, details, response, *args, **kwargs):
+    # If first+last are both missing, populate from full
+    if details.get('fullname') and backend.setting('FIRSTLAST_FROM_FULL', True):
+        if not (details.get('first_name') or details.get('last_name')):
+            first, _space, last = details['fullname'].rpartition(' ')
+            details['first_name'] = first.strip()
+            details['last_name'] = last.strip()
+            print(f"end social_names {details=}")
+
+    # If first+last are both present, populate full if that's missing
+    if not details.get('fullname') and backend.setting('FULL_FROM_FIRSTLAST', True):
+        if details.get('first_name') and details.get('last_name'):
+            details['fullname'] = details['first_name'] + " " + details['last_name']
+
+
 def social_uid(backend, details, response, *args, **kwargs):
     return {"uid": str(backend.get_user_id(details, response))}