Jenkin Mansell, on the accession of Henry VII, in 1485, obtained a repeal of attainder against his father and a restoration in blood and estates. At a tournament given by his cousin, Sir Rice ap Thomas, Knt., Constable and Lieutenant of Brecknock, 21st Henry VII, to celebrate the order of the Garter having been confirmed on him, amongst others from Glamorgan came Jenkin Mansell, surnamed "Dewr," or "the Valiant." In this tournament he bore for motto, "Perit sine adversario virtus."
In 1486 he m. Edith, dau. and heir of Sir Geo. Kyme or Kene, Knt., of Well Hall, Eltham, Co. Kent, and granddaughter of Sir Wm Kyme (who was sheriff of Kent 25 Henry VI), by Agnes, widow of John Tettershall, and dau. of John Chichele, Chamberlain of London, by Margery, dau. of Sir Thos. Knolles, Lord Mayor of London. Agnes was grand-niece of Henry Chichele, Archbishop of Canterbury, who founded All Souls College, Oxford, and all "akin" to him became entitled to a presentation to a fellowship to that college.