Fulk FitzWarin (1160x1180 – c. 1258), variant spellings (Latinized Fulco filius Garini, Welsh Syr ffwg ap Gwarin), the third (Fulk III), was a prominent representative of a marcher family associated especially with estates in Shropshire (on the English border with Wales) and at Alveston in Gloucestershire. In young life (c. 1200–1203), early in the reign of King John (1199–1216), he won notoriety as the outlawed leader of a roving force striving to recover his familial right to Whittington Castle in Shropshire, which John had granted away to a Welsh claimant. Progressively rehabilitated, and enjoying his lordship, he endured further setbacks in 1215–1217.