Baron Grey de Wilton
[Taken from Wikipedia]
Baron Grey de Wilton was a title in the Peerage of England. It was created on 23 June 1295 when Reginald de Grey was summoned to the Model Parliament as Lord Grey de Wilton. This branch of the Grey family of aristocrats was based at Wilton Castle on the Welsh border in Herefordshire.
The fifteenth Baron was attainted in 1603 with his title forfeited. His sister and co-heir, Bridget, married Sir Reginald Egerton, 1st Baronet. In 1784 their descendant Sir Thomas Egerton, 7th Baronet, was created Baron Grey de Wilton, of Wilton Castle in the peerage of Great Britain with remainder to the heirs male of his body. In 1801 he was also made Viscount Grey de Wilton and Earl of Wilton, of Wilton Castle in the County Hereford, in the Peerage of the United Kingdom. The latter titles were created with remainder to the second and the younger sons successively of his daughter Lady Eleanor, wife of Robert Grosvenor, 1st Marquess of Westminster. On Lord Wilton's death in 1804 the Barony of Grey de Wilton became extinct as he had no sons while the Egerton Baronetcy was passed on to a distant relative (see Grey Egerton Baronets). He was succeeded in the Viscountcy and Earldom according to the special remainder by his grandson, the second Earl. These titles are still extant.
The Greys of Wilton as well as the other old noble families bearing the name Grey/Gray are descended from the Norman knight Anchetil de Greye.