Last name Jonttu (Jonttu ) , in the world, is an extremely rare surname. Much more prevalently, Jonttu is the forename as well as the last name.
Laiho, Valtanen, Niittykoski, Leskinen, Rankinen, Piilonen, Kuusisto, Vesanto, Hannula, Reinikainen, Törmänen, Pasanen, Sivonen, Sariola, Tupala, Deezer, Aspvik, Sirkka, Lehto, Luhtavaara, and Savolainen
) , in the world, is an extremely rare surname. Much more prevalently, Jonttu is the forename as well as the last name.