Count of Louvaine and Brabant, 4th Baron de Percy in right of his wife; brother of Queen Adelicia, 2nd wife of Henry I; son of Godfrey-barbatus, Duke of Nether Lorraine, Count of Brabant and Lother, a descendant of the Emperor Charlemagne. The ancient arms of Hainault were retained by Lord Josceline, but his children assumed the surname of Percy by agreement with the heiress of Percy. 2nd and youngest son was Richard de Percy. [Magna Charta Barons, pp. 118-119]
NEWLIN, MINOR LINES - 24th ggrandfather
Bro. of Queen Adeliza, 2nd wife of Henry I; son of Godfry Barbatus, Duke of Lorraine and Count of Brabant, who was descended form the Emperor Charlemagne. Lady Agnes only consented to marry him with the understanding that Joscelyn would adopt either the Percy surname or arms. He chose the former, so as to retain his claim to the principality of his father, should the line of the reigning duke become extinct. Queen Adeliza as a wedding gift granted them the honour of Petworth, Sussex, comprising 21 knights' fees. Henry, the eldest son of this illustrious alliance, was the ancestor of the Percys of Northumberland, whose fame on the field of battle and brilliant marriages occurred with each of the 18 succeeding generations, covering a period of nearly 500 years. [Falaise Roll, p. 47]
b. 1130, d. 1180 [Judy Martin]
b.c. 1113, d. 1179; natural son of Godfrey I, Duke of Brabant/Count of Louvain, and Clementina/Clemence of Burgundy; m. Agnes de Percy; father of Henry de Percy. [WFT Vol 6 Ped 2295]
b.c. 1130, d. 1180; son of Godfrey, Duke of Lorraine/Count of Brabant, and Ide of Nanur/Duchess of Lower Lorraine; m. Agnes de Percy; father of Sir Henry de Percy who m. Isabel Brus. [WFT Vol 6 Ped 1556]
Married Agnes, co-heiress to the Percy estates; apparently 'of handsome presence and great skill in tourney'. Before her death in 1151, Jocelin's half-sister, Queen Adeliz, widow of Henry I, gave him the Honour of Petworth. At the centre of this large estate was a fortified manor house, crenellated by royal sanction in 1309. [Petworth House, p. 56]