Guilhem Anelier de Tolosa (also William or Guillaume) was a troubadour from Languedoc.[1] He was the author of a thirteenth-century Occitan epic poem La Guerra de Navarra, recounting the civil war in Navarre in 1276 - 7. It was published in 1856 as Histoire de la guerre de Navarre en 1276 et 1277, by Francisque Michel. It has been described as a canso.[2]