Sybil d' and Thierry III of were married in a religious ceremony in 1131 in 3rd husband 2nd wife. They had a son and a daughter, named Matthew d' and Margaret of.
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Children
Matthew d' Alsace , Count of Boulogne
Matthew d' was born about 1137 in Alsace, France. He died in 1214.
Margaret of Alsace , Countess of Flanders
Margaret of was born before 1145 in Alsace, Lorraine, France. She died on November 12th, 1194.
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