Catherine was the eldest child of
Raoul I, Count of Clermont-en-Beauvaisis and his wife, Countess Alix. Catherine’s brother Philippe died before Raoul, and Catherine became the Countess of Clermont-en-Beauvaisis after her father’s death. The husband of Catherine was
Louis I, Count of Blois, a grandson of the King of
France. Catherine bore three children to her husband; one of them was
Theobald VI, Count of Blois. ==References==