Theobald VI of Blois

Theobald VI, called the Younger, was count of Blois, Chartres and Clermont-en-Beauvaisis from 1205, the son of Count Louis I of Blois. Before 1213 he married Matilda of Alençon, and later Clemence, daughter of William des Roches.

He campaigned against the Muslims in Spain, where he contracted leprosy, and afterwards lived withdrawn in his castle at La Ferté-Villeneuil. He died childless in April 1218, leaving Blois to his aunt Margaret and Chartres to his aunt Isabelle, while Clermont was sold to the French crown.