The primary source which confirms her parentage and marriage has not yet been identified. Thietmar records the death on 27 Oct of "the venerable Friderun whose guests we were" in a passage recording his stay at the fortress of Zörbig, dated to 1015. Her unusual name could indicate that she was related to Frederuna, sister of Queen Mathilde. 1
Marriage Information:
Frederuna married Gf. Bruno VON ARNEBURG. (Bruno VON ARNEBURG died on 30 Nov 978.)
Sources
1 Foundations for Medieval Genealogy, Medlands, Frederuna.