Eleanor Beaufort married twice. Her first marriage was in circa April 1458 to James Butler, 5th Earl of Ormond, 1st Earl of Wiltshire (d. 1461). Butler was Lieutenant of Ireland in 1453; when civil conflict broke out, the lieutenant fought on the Lancastrian side. He was present at the First Battle of St. Albans in 1455, Mortimer's Cross in 1461, and at the Battle of Towton. Butler also held the post of councilor to the Lancastrian Prince of Wales. After Towton, he was a proscribed as a traitor and was captured in the same year at Cockermouth and executed there in 1461.