Counts of Walbeck
After Conrad , the Counts of Walbeck transitioned to the Margraves of Nordmark ( Northern March ) . Helperich , grandson of Conrad , is also listed as a Count of Walbeck , but the title was likely ceremonial . 
<triplet> Thietmar of Merseberg <subj> Henry <obj> sibling <subj> Frederick <obj> sibling <triplet> Henry <subj> Thietmar of Merseberg <obj> sibling <subj> Frederick <obj> sibling <triplet> Frederick <subj> Thietmar of Merseberg <obj> sibling <subj> Henry <obj> sibling