Chatháin
Chatháin is a surname of Irish origin. It is an anglicized form of the Gaelic Ó Catháin, meaning "descendant of Cathán." The personal name Cathán itself is derived from the word "cath," meaning "battle" or "warrior." This surname is particularly associated with the ancient kingdom of Uí Chatháin in modern-day County Londonderry, Northern Ireland. The ruling sept of this territory bore the name Ó Catháin.
Over centuries, as Irish families migrated and anglicized their names, Ó Catháin became known as O'Kane, Kane,