He is married to Thietburga von Haldensleben.
They got married
Child(ren):
DEDO [I] (-killed in battle near Mose bei Wolmirstedt 13 Nov 1009). He is named as son of Dietrich in the Annalista Saxo, which records that he served Markgraf Ricdag and his son Karl[253]. Thietmar records that he was appointed Graf von Merseburg in succession to Count Bio[254]. m (before 985) THIETBURGA [von Haldensleben], daughter of DIETRICH Markgraf über den Gau der Heveller [Nordmark] & his wife ---. The parentage of the wife of Graf Dedo is deduced from her brother Bernhard being described as avunculus of her son, although she is not named in this passage[255]. Thietmar is more explicit, stating that Dedo married "Markgraf Dietrich's daughter, Thiedburga"[256].
Graf Dedo [I] & his wife had one child:
DIETRICH (-murdered 19 Nov 1034).
Bronnen:
[253] Annalista Saxo 1009.
[254] Thietmar 6.50, p. 272.
[255] Annalista Saxo 1010.
https://fmg.ac/Projects/MedLands/MEISSEN.htm#DedoIdied1009