General Notes

WILLIAM PERCEVAL DE SOMERY, brother and heir. On 19 February 1220/1 he was granted the scutage of Biham; in 1222 he was party to a suit of land in Staffs. He was dead before 20 June 1222, when the Earl of Chester and Lincoln was granted the custody of his land and heir, with the heir's marriage. His wife is unknown.  [Complete Peerage XII/1:111-2, (transcribed by Dave Utzinger)]

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SOMERY
Volume 12, Part 1, pages 111, 112:

William's wife, and the mother of his heir, appears to have been Rohese, the daughter and heir of Nicholas de Verdun of Alton, Staffordshire, by his wife Clemence. Rohese subsequently married, after 4 September 1225, Theobald Butler (d.1230) [Complete Peerage, vol.2, p.448].

In a charter for the priory of Grace Dieu, at Belton, Leicestershire, which she had founded, Rohese made provision for the souls of her husbands, although no husbands except Theobald have hitherto been identified [Dugdale, Monasticon Anglicanum, vol.6, p.567 (Caley's edn, 1817-30); the charter was confirmed by the king, 10 December 1241 (Cal. Charter Rolls, vol.1, p.265)].

It seems clear that Rohese had previously married William Perceval de Somery, from the terms of two orders concerning the custody of William's heir. On 20 June 1222 the king notified Nicholas de Verdun that he had granted custody of the land and heir of William de Sumeri, with the marriage of the heir, to the earl of Chester, and ordered Nicholas to deliver the daughter [apparently an error for "son", either in the original, or the published transcript] and heir to the earl without delay [Rot. Lit. Claus., vol.1, p.500, col.b]. On 27 January 1222/3 the king ordered Nicholas de Verdun and Rohese, his daughter, to deliver without delay the son and heir of William Perceval of Sumery to the earl of Chester [Rot. Lit. Claus., vol.1, p.531]. Rohese's inclusion in this order is explicable only if she is William's widow, and the mother of his heir, who seems to have been named after her father Nicholas.  [Some Corrections to the Compl