Surname Fionan (Fionan 
) , all over the world, is an extremely rare cognomen. The family name Fionan is habitual in Southern Europe, particularly Spain, where it is an extremely rare surname. Much more prevalently, Fionan is the forename as well as the last name.
Foo, Doonan, Gannon, Gorman, Tallon, Horgan, Hussey, Falvey, Obrien, Ogriofa, Maccann, Sheahan, Griffin, O'Healai, Mccarthy, Shanahan, Costello, Clifford, O'Reilly, Comerford, Osullivan, O'Carroll, Donagh, Direen, Keegan, Cronin, Shea, Cann, King, Rice, Ryan, Daly, Magee, Moran, Smyth, Allen, O'Driscoll, Coyle, Keane, Dolan, Lavin, Leahy, Lewis, Lynch, Henry, Murphy, Cahill, Coffey, Burke, and O'Sullivan