A manuscript genealogy of the Percy family names “Willielmum” as son of “Henricum”, adding that he was born during the lifetime of his paternal grandmother. The Percy inheritance was split between him and his uncle Richard de Percy. William received those parts in the hands of his great aunt Matilda Ctss of Warwick, but on his uncle’s death the latter’s moiety reverted to William. During his minority he was in the guardianship of William Briwere, one of whose daughters he married. He attained full age between 1212 and 1214. The Red Book of the Exchequer records "Willemus de Percy" holding 15 knights’ fees "de honore de Tadecastre" in Yorkshire in [1210/12]. The Testa de Nevill includes a list of fees of William Briwere, dated 1234, records "porcio Willelmi de Percy cum filiabus suis...filiarum et heredum Johanne que fuit uxor Willelmi de Percy".
A manuscript genealogy of the Percy family records that “Willielmum”, son of “Henricum”, was buried “apud Sallay”. 1
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12 Jun 1233, Worcester
William de Percy has made fine with the king by 500 marks for having the custody of his five daughters, certain of the heirs of William Brewer junior , together with the portion which falls to them of the lands formerly of William until the lawful age of his same daughters, with their marriages. Because the same William has given the king surety for rendering the aforesaid 500 marks to the king by Reginald de Mohun , who is his pledge for first paying 100 marks of the same fine, and by Hugh Wake and Payn de Chaworth , who are his pledges for the rest of the said fine, at these terms, namely £50 at the Exchequer of Michaelmas in the seventeenth year, £50 at the Exchequer of Easter in the eighteenth year, £50 at the Exchequer of Michaelmas in the same year, £50 at the Exchequer of Easter in the nineteenth year, and 100 marks at the Exchequer of Michaelmas in the same year, and 100 marks at the Exchequer of Easter in the twentieth year, order to the sheriff of Hampshire to cause the same William, in the name of his aforesaid daugters, to have full seisin without delay of the manor of Ashley with appurtenances as the part of the portion that falls to them of the aforesaid lands formerly of William Brewer, saving to each her right...
Calendar of the Fine Rolls, 17 Hen. III, 217
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28 Jul 1245
De herede Willelmi de Percy regi mittendo.—Mandatum est vicecomiti Ebor' quod primogenitum filium et heredem Willelmi de Percy salvo quam citius poterit ad regem ubicumque fuerit mitti faciat in custodia regis commorandum.
Calendar of the Close Rolls, 29 Hen. III, p. 332
20 Aug 1245, Chester
Promise to B. de Mastak, count of Bygor, to assign to him land to the
value of £250 a year of the lands late of W. de Percy during the minority of the heir for the fee he is accustomed to receive at the Exchequer and for the land which he lost beyond seas by reason of his service ; and before the majority of the said heir, the king will assign to him land to that value in other lands in England for his life unless he recover his own land, in which case the said £250 of land shall at once revert to the king, but the count shall receive at the Exchequer a yearly fee of 100 pounds of Paris which he used to receive of the king of France, but which he lost because of his service to the king.
Calendar of Patent Rolls, Hen. III, vol. 3, p. 459
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Inquisition Post Mortem
64. WILLIAM DE PERCY. 2
Writ to Robert de Creppinges 30 Jan. 30 Hen. III. [1245/6]. Inq. (undated.)
[YORK.] The said William gave to Roger Maudit and Robert, his son, and his heirs, 20s. rent from Tadecastre mills; and to the prior of Park 2 marks rent from the same, until the said William should make to him and his heirs an exchange of 2 bovates land and a toft in Tadecastre.
C. Hen. III. File 4. (4.)
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26 Mar 1246
Pro filio Willelmi de Percy.—Quia regi constat per inquisicionem
quam fieri fecit quod Willelmus de Percy' per iij. annos ante mortem
suam dedit in feodo Enger' de Percy, et Willelmo et Alano et Jocelino fratribus ejusdem Enger', filiis suis, manerium suum de Levinton'
cum pertinenciis, et illud commisit abbati de Salleg' custodiendum ad
opus eorundem filiorum suorum, ita quod idem Willelmus de Percy
nichil percepit de exitibus ejusdem manerii per ipsos iij. annos predictos, mandatum est Roberto de Crepping' quod eisdem Enger' Alano Willelmo et Jocelino seisinam habere faciat de eodem manerio cum pertinenciis qualem inde habuerunt quando rex terras ejusdem
Willelmi capi preceperit in manum suam, et siquid de manerio illo
percepit a tempore predicto eis reddi faciat.
Calendar of the Close Rolls, 30 Hen. III, p. 405
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17 Jan 1249, Guildford
Mandate to all the tenants to do their homage and service to Henry de
Percy their lord, the son and heir of William de Percy, the king having
taken his homage for all the lands which the said William held in chief.
Calendar of Patent Rolls, Hen. III, vol. 4, p. 36
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25 Jul 1252, Marlborough
Grant, for life, to Ellen de Percy that her woods of Ravenesclive,
Cumbes and Eggel within the metes of the king's forest of Pikering and pertaining to her manor of Semer, which she holds in dower of the free tenement late of William de Percy, her late husband, shall be quit of regard and she shall take her profit in the said woods without view and livery of the king's foresters and without waste and destruction and that she hold the said manor and woods as freely as when she was dowered therewith ; on condition that after her decease or the letting of the said manor, the said woods shall remain within the regard in the same manner as other woods, which are within the regard.
Calendar of Patent Rolls, Hen. III, vol. 4, p. 146
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