I

Iid-Kaseva

Ilomäki (see also Koivisto, Mäkinen!)

Impponen

Innala (see also Lundén, Pitkäjärvi)

Isaacsson (see also Hautala!)

Isoaho (see also Ahonen, Kauppi!)

Isomäki

Isoviita (see also Rantanen, Lehtonen!)

Itäpää (see also Piirtola!)