Yolanda Of Guelders 
Yolanda Of was born about 1090. Yolanda Of's father was Gerald I , Count Of Guelders De Wassenburg and her mother was Clementia Of Aquitaine. She had a half-sister named Yolanda Of.
‌Yolanda Of and III, Count Of Hainault were married in a religious ceremony in 1107. They had a son and two daughters, named Baldwin IV, Count Of Hainault, Ida Of and Richilde.
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Children
Baldwin IV, Count Of Hainault UNKNOWN
Baldwin IV, Count Of Hainault was born in 1109. He died at the age of 62 on November 8th, 1171.