Wikipedia has an article on: Cadwallon Wikipedia From <span class="searchmatch">Proto</span>-Celtic *Katuwelnāmnos. *<span class="searchmatch">Kaduwallọn</span> a male given name, equivalent to English Cadwallon Old...
*Katuwelnāmnos a male given name, equivalent to English Cadwallon <span class="searchmatch">Proto</span>-<span class="searchmatch">Brythonic</span>: *<span class="searchmatch">Kaduwallọn</span> Old Breton: Kaduuallon, Catuuallon Breton: Kadwallawn Cornish:...