Theobald I may refer to: Theobald I, King of Austrasia, ruled 548-555 Theobald I, Count of Blois, ruled 928–975 Theobald I, Count of Champagne ruled 1037–1089 Theobald I, Duke of Lorraine (c. 1191 – 1220) Theobald I, King of Navarre ruled 1234–1253