He was the son of Fjölner and at his father's death he vowed to go to Godheim (Asgard) and visit Odin. He took his twelve hirdmen and went through the world. He came to Turkland and Great Sweden (Russia), but after five years he returned home. He got himself a wife from Vanaheim (a Vanir?) who was called Vana and they had the son Vanlande. Then Sveigder resumed his search for Odin and came to a mansion east of Sweden called Stein (see also Ingvar) which was called so because there was a stone as big as a house. After sunset, Sveigder was going to bed from having drunk with the hosts, and passing the stone he saw that a dwarf was sitting under it. Sveigder and his companion were drunk and ran for the dwarf. The dwarf called to Sveigder to come into the stone and see Odin which Sveigder did and he never came back.
By Diurnir's elfin race,
Who haunt the cliffs and shun day's face,
The valiant Swegde was deceived,
The elf's false words the king believed.
The dauntless hero rushing on,
Passed through the yawning mouth of stone:
It yawned -- it shut -- the hero fell,
In Saekmime's hall, where giants dwell.[1] (http://www.sacred-texts.com/neu/heim/02ynglga.htm)
His son Sveigder disappeared during a journey which he made in order to find Odin, the old.
Both the names Fiolner and Sveigder appear to be mythical.
He is said once to have taken up his winter abode in Finland, which, together with several archæological finds, point to an early inter-course between Sweden and Finland.