[LOTHAR [II] von Stade (-killed in battle near Lenzen an der Elbe 5 Sep 929). No proof has been found that Lothar [II] was the son of Lothar [I] but this looks likely. Thietmar records the death of two of his great grandfathers "both named Liuthar" at the battle of Lenzen 5 Sep[1805].]
m SWANEHILD, daughter of --- (-13 Dec-). The primary source which confirms her marriage has not yet been identified. Graf Lothar [II] & his wife had four children:

a) HEINRICH [I] "der Kahle" von Stade (-11 May 976, bur Kloster Heeringen). The paternity of Heinrich is determined from Thietmar recording the death of two of his great grandfathers "both named Liuthar" at the battle of Lenzen 5 Sep[1806]. Graf von Stade. He constructed Burg Harsefeld in 964.
b) GERBURG von Stade . The primary source which confirms her parentage has not yet been identified.
c) SIEGFRIED [I] von Stade . The primary source which confirms his parentage has not yet been identified. Graf von Stade 954/973. "Otto…rex" granted property "Asundorf marcam et Dornsteti marcam Liubissa…in pago Hassigeuui in comitatu comitis Sigiuuridi…loco Biscopstat…in pago Altgeuui in comitatu comitis Uuillihelmi" to "vassallo Billing" by charter dated 23 Apr 961[1807].
d) THIETMAR von Stade (-12 Mar 1001). The primary source which confirms his parentage has not yet been identified. Abbot of Corvey 983.

https://fmg.ac/Projects/MedLands/SAXON%20NOBILITY.htm#_Toc509136503

Swanehild (or Swanhild). Her ancestry is unknown. She might have been a daughter of:

• Eberhard van Hamalant
• Wichman van Hamalant

Her birth and death dates are guesses. The only thing that is known for sure is that she died on December 13, probably in the early 900s. Ref: Europäische Stammtafeln, one of the standard authorities on medieval lines.

Source: Leo van de Pas: Europäische Stammtafeln, J.A. Stargardt Verlag, Marburg, Schwennicke, Detlev (Ed.), Reference: VIII 133. http://www.genealogics.org/getperson.php?personID=I00201291&tree=LEO