O'Regan

O'Regan is a surname of Irish origin. It is an anglicized form of the Gaelic surname Ó Riagáin, meaning "descendant of Riagán." The given name Riagán is a diminutive of "rí," meaning "king." Therefore, O'Regan roughly translates to "descendant of the little king" or "descendant of the kingly one."

The O'Regan surname is most commonly found in County Cork, Ireland. Variations of the name include Regan, Reegan, and Reagan. Notable people with the surname O'Regan include individuals in politics, academia, sports, and the arts. Genealogical research can often provide further insight into specific family histories associated with the O'Regan name.