Where does “Callen” come from?
Callen (English) comes from English Callan, from Irish Ó Cathaláin, from Irish Cathalán, from Old Irish Cathal, from Proto-Celtic Katuwalos, from Proto-Celtic katus, from Proto-Indo-European kéh₃tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.
Ancestry of “Callen”, step by step