Background
He was the son of Frederick, count of Moselgau, and possibly Ermentrude of Gleiberg.
He was the son of Frederick, count of Moselgau, and possibly Ermentrude of Gleiberg.
In 1042, he was given Bavaria by the Emperor Henry III, who had hitherto held it, but who needed a resident duke to deal with the raids of Samuel Aba, king of Hungary.
