The primary source which confirms her parentage has not yet been identified. Thietmar records the death of his paternal grandmother Mathilde on 3 Dec in the same year in which her son Siegfried died. 1
Marriage Information:
Mathilda married Lothar II, graf von Walbeck, son of Lothar I, graf von Walbeck. (Lothar II, graf von Walbeck died on 21 Jan 985/6.)