Treanor
Treanor is a surname of Irish origin, commonly found in County Cavan and surrounding areas. It is an anglicized form of the Gaelic Ó Treanair, meaning "descendant of Treanair." The personal name Treanair itself is thought to derive from the Irish word "trean," meaning strong or powerful.
Historically, the Treanor family has been associated with the O'Reilly clan, a prominent Gaelic Irish dynasty
While the surname is most concentrated in Ireland, individuals with the Treanor surname can be found globally.