In Finnish mythology, Ahti (Finnish pronunciation: [ˈɑhti]) is a heroic character in folk poetry who is sometimes given the epithet Saarelainen (pronounced [ˈsɑːrelɑi̯nen], "Islander").
Ahto [ˈɑhto] is a Finnish sea god. Ahti is the more common name for Ahto, but Ahto is used in the Finnish epic Kalevala as to avoid confusion with Ahti Saarelainen, the hero.