Guilhem or Guillem Fabre was a troubadour and burgher from Narbonne. He may be the same person as the dedicatee of En Guillems Fabres, sap fargar, a eulogistic poem by Bernart d'Auriac. He was one of several mid- to late-thirteenth-century troubadours from Narbonne, with Bernart Alanhan and Miquel de Castillon.