Joukahainen
Joukahainen is a character from the Finnish national epic Kalevala .
He challenged Väinämöinen to a singing duel, but could not defeat its magical voice. Thereupon he was conjured into a swamp by Väinämöinen. He saved his life by promising Väinämöinen his sister Aino to be a wife.
Joukahainen later shot Väinämöinen's horse to seek revenge, causing his opponent to fall into the sea of the northern Pohjola . In Finnish folk poetry, the shooter is not Joukahainen, but "lappalainen kyyttösilmä" (squinted eye from Lapland), the shot took place before the creation of the world. Väinämöinen's horse is described as a blue elk ( sininen hirvi ).
The Finnish first name Jouko is derived from Joukahainen.