In 1055 he had joined the rebellion of his Ezzonid cousin Duke Conrad I of Bavaria and Duke Welf of Carinthia against Emperor Henry III. Nevertheless, upon Henry's death in 1056, he was pardoned by his widow Agnes of Poitou and enfeoffed with the Carinthian duchy.
In 1055, he joined the rebellion of his Ezzonid cousin Duke Conrad I of Bavaria and Duke Welf of Carinthia against Emperor Henry III.  After Henry's death in 1056, he was pardoned by his widow Agnes of Poitou and granted the Carinthian duchy.