Yolande de Wasseburg 
Yolande was born in 1089. She was an only child. She died at the age of 21 in 1110.
They had a son named Baldwin IV of , Count of Hainault.
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Children
Baldwin IV of , Count of Hainault Mons
Baldwin IV of , Count of Hainault was born in 1108. He died at the age of 63 on November 8th, 1171.
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