Roger de Mortimer, d. before 19 Aug 1214, Lord Mortimer of Wigmore, co. Hereford; m. Isabel, d. before 29 Apr 1252, granted a life interest in Lechlade, co. Gloucester & Oakham, co. Rutland which her brother Henry lost at time of conquest of Normandy, daughter of Walkelin de Ferrieres, seigneur of Ferriers-Saint-Hilaire, and lord of Oakham, Rutland. [Ancestral Roots]
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Roger de Mortimer, Lord of Wigmore, a feudal baron who, like his predecessors, was in constant strife with the Welsh. At one time he sustained a great defeat in conjunction with Hugh de Say, but in the end he was victorious and took twelve of their principal leaders in one battle. He also enlarged considerably his territories and drove thieves and robbers from those pars. Being at one time present at the solemn anniversary of his father, he confirmed all his grants to the canons of Wigmore, adding, of his own gift, a spacious and fruitful pasture lying adjacent to the abbey, called the Treasure of Mortimer, upon which occasion, his steward remonstrating with him for parting with so valuable a treasure, he replied, "I have laid up my treasure in that field, where thieves cannot steal or dig, or moth corrupt." This Roger m. Millicent, dau. of --- Ferrers, Earl of Derby, and had issue, Hugh, his successor, and two daus., the elder m. to Stephen le Gross, the younger to Walcheline de Beauchamp. He m. 2ndly, Isabel, sister and heir of Hugh de Ferrers, of Oakham, in Rutlandshire, and of Lechelade and Lagebury in Gloucestershire. All which lands he inherited upon the death of the said Hugh de Ferrers, and by that lady he had three sons, Ralph, Robert, and Philip. He d. in 1215, and was s. by his eldest son, Hugh de Mortimer. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage Ltd, London, England, 1883, p. 383, Mortimer, Barons Mortimer, of Wigmore, Earls of March]