Non-existent anchors are marked with [Invalid]. These redirects can be retargeted to the correct section or by adding an anchor to the page (e.g.
== Other related media <span id="Video games"></span>==). Incorrect redirects are sometimes caused by bots fixing double redirects.
Llywelyn_ap_Gruffydd might be related
Viewing 5 redirects286 anchor found in Kingdom of Gwynedd of which 37 were not produced by cite.php