LOTHAR [I] von Walbeck, son of --- (-killed in battle near Lenzen an der Elbe 5 Sep 929). Thietmar records the death of two of his great grandfathers "both named Liuthar" at the battle of Lenzen 5 Sep[1748].

m --- . The name of Lothar's wife is not known.

Graf Lothar [I] & his wife had one child:

1. LOTHAR [II] von Walbeck (-986). Thietmar names his grandfather "Liuthar", recording that he participated in the plot to assassinate Emperor Otto I for which he exiled to Bavaria "to be held in captivity by Count Berthold" where he remained for a year[1749]. Graf von Walbeck. m MATHILDE von Arneburg, daughter of BRUNO Graf von Arneburg [Querfurt] & his wife Frederuna --- (-3 Dec 992). 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[1750]. Graf Lothar [II] & his wife had four children:

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