Save Type Surname (from given name) Usage Irish Pronounced Pron. RAY-gən [key·IPA] Expand LinksMeaning & History Anglicized form of Irish Ó Ríagáin meaning "descendant of RIAGÁN". A famous bearer was American president Ronald Reagan (1911-2004). DetailsRelated Names VariantsÓ Ríagáin, ReganGiven Name DescendantReagan(Irish) Categories American presidential surnames, anglicizations Entry updated November 16, 2019 ·