The county of Perche was a medieval county lying between Normandy and Maine. It was held by an independent line of counts until 1226. One of these, Geoffroy V, would have been a leader of the Fourth Crusade had he not died before the assembled forces could depart. The county then became a possession of the crown, which removed part of it to create the county of Alençon. After 1325, both counties were generally held by a member or members of a cadet line of the House of Valois. Upon the death without children of the last Duke of Alençon in 1525, it returned to the crown, and was granted only sporadically thereafter. Lords of Mortagne, lords of Nogent-le-Rotrou and viscounts of Châteaudun The lords of Perche were originally titled lords of Mortagne-au-Perche, until Routrou III adopted the style of count of Perche in 1126, thus uniting the lordship of Mortagne-au-Perche, the viscountcy of Châteaudun and the lordship of Nogent-le-Rotrou in the countship of Perche and Montagne. Lords of Mortagne House of Rorgonid Hervé I, 941- 955 Hervé II, 974–980, son of the previous Here after, the title is merged with the viscount of Châteaudun and the lord of Nogent-le-Rotrou. Lords of Nogent-le-Rotrou House of Nogent-le-Rotrou Rotrou I, 960–996 Fulcois, son of the previous and husband of Melisende, Viscountess of Châteaudun, daughter of Herve I Here after, the title is merged with the viscount of Châteaudun and the lord of Mortagne-au-Perche Viscounts of Châteaudun House of Châteaudun ... Lords and counts of Perche and Mortagne House of Châteaudun Fulcuich, c. 1000 Geoffroy I, d. bef. 1041 (viscount of Châteaudun, lord of Nogent-le-Rotrou and of Mortagne-au Perche) Hugh I, d. c. 1077–1080 (viscount of Châteaudun, lord of Nogent-le-Rotrou and of Mortagne-au Perche) Rotrou II, d. c. 1077–1080 (viscount of Châteaudun, lord of Nogent-le-Rotrou and of Mortagne-au Perche) Here after, the title is separated in count of Perche and count of Mortagne. Counts of Perche House of Châteaudun Geoffroy II, d. 1100, a companion of William the Conqueror Rotrou III the Great, d. 1144 (also Count of Mortagne 1126–1144), married to Matilda (second wife) and Hawise of Salisbury, daughter of Walter of Salisbury (third wife) Rotrou IV, under the regency of his mother Hawise and her second husband Robert I of Dreux. Married to Matilda (d. 1184), daughter of Theobald IV. Killed at Siege of Acre, 1191. Geoffroy III, d. 1202 (married