Theobald IV, Count of Champagne (d. 1253)
Theobald I (French: Thibaut, Spanish: Teobaldo; 30 May 1201 – 8 July 1253), also called the Trobadour and the Posthumous, was Count of Champagne (as Theobald IV) from birth and King of Navarre from 1234. He initiated the Barons' Crusade, was famous as a trouvère, and was the first Frenchman to rule Navarre.