Several popes have been named Martin (in Latin, Martinus):

Pope Martin I (saint; 649–654) Pope Martin II (Pope Marinus I) (882–884) Pope Martin III (Pope Marinus II) (942–946) Pope Martin IV (1281–1285) Pope Martin V (1417–1431)

See also Pope Marinus (disambiguation), to explain the occurrences of the Marinus name above