..., Volphger, who was descended from the counts of Hemburg, came with his brother Hedricus from Alemannia with three hundred armed horsemen, to whom Duke Geysa made a gift of Mount Kyscen and an island in the Danube near Iaurinum that he might dwell there for ever; here he built a castle of wood, and on the same mountain he founded a monastery, where he is buried.

Grand Prince Géza donated [to Wolfer] the Mountain of Küszén and an island in Győr's neighborhood, where he built a wood castle and founded an abbey, he was buried there.

Simon of Kéza's Gesta Hunnorum et Hungarorum writes that Wolfer and Héder came from "Vildonia" with forty armored soldiers, referring to Burgruine Wildon in Styria, however the castle itself was built only after 1157 thus that identification is incorrect.

Héder was donated lands and villages in the island plain of Szigetköz in Győr County by King Géza II,[3] while Wolfer became owner of Németújvár (today Güssing in Austria) where he founded a Benedictine monastery and later was buried himself there.

[7] In this capacity, he persuaded Raphael, the abbot of Pannonhalma to borrow 40 silver denari to the king, who planned to visit Henry II, Duke of Austria with his court and a large number of escorts.

When Géza invaded the Byzantine Empire and laid siege to Braničevo in late 1154, plausibly Héder and his brother also participated in the campaign alongside other German knights, as Greek historian John Kinnamos referred to them "Saxon" mercenaries.

[8] In fear of being seized and executed by King Géza II, his brother, the rebellious Duke Stephen sought refuge in the Holy Roman Empire in the summer of 1157.

[9] At the Diet of Regensburg in January 1158, Héder and Gervasius rejected the accusations of Stephen and successfully reached the Emperor withdrew his support from the pretender.