In the 9th and 10th of King John [1208 and 1209] flourished Thomas de Multon who, at that period, was sheriff of the co. Lincoln, and in the 15th of the same reign, attended the king in his expedition then made into Poictou. This Thomas gave 1,000 marks to the crown for the wardship of the daus. and heirs of Richard de Luci, of Egremont, co. Cumberland, and bestowed those ladies afterwards in marriage upon his two sons, Lambert and Alan. In the 17th John [1216], being in arms with the rebellious barons and taken at Rochester Castle, he was committed to the custody of Peter de Mauley to be safely secured, who conveyed him prisoner to the castle of Corfe, but in the 1st Henry III [1216], making his peace, he had restitution of his liberty and his lands. The next year, having m. Ada, dau. and co-heir of Hugh de Morvill, widow of Richard de Lacy, of Egremont, without the king's license, command was sent to the archbishop of York to make seizure of all his lands in Cumberland and to retain them in his hands until further orders. Multon giving security, however, to answer the same whensoever the king should require him to do so, he had livery of all those lands which had been seized for that transgression, with the castle of Egremont. In three years afterwards, he paid £100 fine to the king and one palfrey for the office of forester of Cumberland, it being the inheritance of Ada, his wife. In the 17th Henry III [1233], he was sheriff of Cumberland and remained in that office for several succeeding years. Moreover, he was one of the justices of the king's Court of Common Pleas from the 8th Henry III, and a justice itinerant for divers years from the 8th of the same reign.
He m. twice; by his 1st wife, he had issue, Lambert, m. Annabel de Luci, and Alan, m. Alice de Luci, both daus. and co-heirs of Richard de Lucie. Thomas de Multon m. 2ndly, Ada, dau. and co-heir of Hugh de Morville, and had, by that lady, Thomas, Lord of Multon, and Julian, m. to Robert de Vavasour.
This celebrated feudal lord, who was a liberal benefactor to the church, is thus characterized by Matthew Paris: "In his youth he was a stout soldier, afterwards very wealthy and learned in the laws; but overmuch coveting to enlarge his possessions, which lay contiguous to those of the monks of Crowland, he did them great wrong in many respects." He d. in 1240, and was s. by his eldest son, Lambert de Multon. [Sir Bernard Burke, Dormant, Abeyant, Forfeited, and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 388, Multon, Barons Multon, of Egremont]