The Genealogia Welforum names "Heinricum, qui apud Lonon in venatione saxo percussis interiit, et Gwelfum huius nominis primum" as sons of Rudolf and Ita, specifying that he was buried at Weingarten. The Historia Welforum names (in order) "Heinricum et Guelfonem et filiam Richgardam" as the children of "Roudolfus" & his wife. The Annalista Saxo names "Welphum comitem" as son of Rudolf (brother of Eticho/Welf and Konrad, although this appears difficult to sustain chronologically).
Graf von Altdorf. Graf im Nori- und Inntal. "Heinricus…Romanorum imperator augustus" renewed the privileges of Kloster Fulda by undated charter, placed in the compilation with other charters dated 1020, witnessed by "Godifridi ducis, Berinhardi ducis, Thiederici ducis, Welphonis comitis, Cunonis comitis, Kunrati comitis, Ottonis comitis, Adilbrahtis comitis, Bobonis comitis, Friderici comitis, Bezilini comitis, Ezonis comitis palatini", the order of witnesses presumably giving some idea of the relative importance of these named nobles at the court of Emperor Heinrich II at the time. A codex of Kloster Weingarten records that "dux Welfo…cum uxore sua Irmindrude…de Glizberc" transferred Kloster Altorf "super montem". His county around the Brenner pass was confiscated by Emperor Konrad II as a punishment for Welf having supported Ernst Duke of Swabia in his rebellion in 1030.
He built the castle of Ravensburg on his Swabian lands which became the family's chief residence.
The necrology of Weingarten records the death "VI Id Mar" of "Ruodolfus com frater sancti Chuonradi…et Welf filius eius…hic sepulti". 1
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