“ His titles and estates were forfeited, but in 1399 the earldom of Suffolk and most of the estates were restored to his son Michael (c. 1361–1415) . Michael, the 3rd earl (1394–1415) , was killed at the battle of Agincourt, and the earldom passed to his brother William (1396–1450) , who was created earl of Pembroke in 1443, marquess of Suffolk in 1444, and duke of Suffolk in 1448 (see Suffolk, William de la Pole, Duke of) . The duke’s son, John, 2nd duke of Suffolk (1442–1491) , married Elizabeth, daughter of Richard, duke of York, and sister of King Edward IV., by whom he had six sons. ”

“ This Robert had several sons, one of whom was Sir Ralph de Ufford (d. 1346) , justiciar of Ireland, who married Maud, widow of William de Burgh, earl of Ulster, and daughter of Henry Plantagenet, earl of Lancaster. ”