Count Adolf of Dassel and Nienover & Countess Adelheid of Wassel 
Adolf and Adelheid were married in 1189.1 They had three sons and a daughter, named Ludolf, Adolf, Berthold and Adelheid.
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Children
Countess Adelheid of Dassel
Adelheid was born in 1198 in Dassel, Hannover, Prussia.1 She died at the age of 65 on September 14th, 1263.1
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I33447&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I33468
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I33468