Reagan
The family name Reagan, and its cognates Regan, O'Regan, O Regan, O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin.
The family name Reagan, and its cognates Regan, O'Regan, O Regan, O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin.