Guillem Ramon de Moncada or Guillermo II de Bearn was, from 1224 until his death, Lord of Montcada and Castellví de Rosanes and, as Guillermo II, Viscount of Bearn, of Marsan, of Gabardan and of Brulhois. He was the son of Guillem Ramon de Montcada and Guilleuma de Castellvell.