It is also the name of one of the heroes of the Kalevala, the eternal smith. He forged the sky, Sun and Moon. He also created the sampo on which the heavens rest, and even a golden wife for himself. Ilmarinen gave mankind fire and he taught them how to work with ores and make iron objects. He is the patron of travelers. He was a good friend of Väinämöinen and they often went on adventures together.
A Finnish sky-god, lord of wind and good weather (ilma), "giving calm and bad weather, and furthering travelers (sailors)", according to Agricola.