1. Constance QUEEN OF CASTILE AND LEON was born in 1354. She died in 1394. She married John of Gaunt DUKE OF LANCASTER.

John of Gaunt DUKE OF LANCASTER, son of Edward III KING OF ENGLAND (1312-1377) and Philippa de Hainault (1311-1369), was born in March 1340. He had the title 'Duke of Lancaster'. He married Katherine ROET in 1396. He died on [Julian] 3 February 1399.