Henry I of Navarre

Henry I, called the Fat (c. 1244–1274), was the youngest son of Theobald I of Navarre and Margaret of Bourbon. He governed as regent during the absences of his childless brother Theobald II, whom he succeeded as king and count of Champagne in December 1270.

He swore to uphold the fueros at Pamplona in 1271 and did homage to Philip III for Champagne. In 1272 he arranged a marriage between his son Theobald and Violant, daughter of Alfonso X of Castile. Theobald died after a fall in 1273, and Henry died in July 1274, leaving his daughter Joan under Blanche of Artois's regency.