ROGER DE LEYBURN, son and heir, by Margaret, was of full age in 1214. He held Bures, Essex, early in Henry III's reign by the serjeanty of scalding the King's swine, and in 1228 conveyed by fine 2 carucates and 2 marshes there, with the advowson of the church, to William Bigod and Margery his wife, who in 12 Henry III held in Bures by the same serjeanty. In 1215 he was in rebellion against King John, and, being taken prisoner at the capture of Rochester Castle, obtained his liberty by paying a fine of 250 marks, by reason of which he fell into debt to the Jews.
He married, in or before 1219, Eleanor, youngest daughter and coheir of his guardian, Stephen DE THURNHAM, by Edeline, daughter and coheir of Ranulf DE BROC (n). With her he had the manor of Great Berwick in Shropshire. She was dead by 1220. He married, 2ndly, Agnes, widow of Henry DE MINERS, of co. Hereford. He died circa 1251. [Complete Peerage VII:630, (transcribed by Dave Utzinger)]
(n) The husbands of the other 4 daughters were Thomas de Bavelingham, Adam de Bending, Ralph son of Bernard de Tong, and Ralph de Faye (she m. 2ndly Hugh de Neville, see vol X, p. 480, sub Neville). [Complete Peerage VII:630 note (n), XIV:433]