sentences:  Anne Mortimer, Edmund Mortimer's eldest sister and Lionel of Antwerp's great-granddaughter, married Richard, Earl of Cambridge of the House of York, merging the Lionel of Antwerp/Mortimer line into the York line.John of Gaunt (6 March 13403 February 1399), 1st Duke of Lancaster, fourth son.From the marriage of John of Gaunt and Blanche of Lancaster, daughter and heiress of the Duke of Lancaster, descended legitimate male heirs, the Lancasters (King Henry IV (1399–1413), who as Henry of Bolingbroke in 1399 deposed his first cousin King Richard II (1377–1399), and was followed by his son King Henry V (1413–1422) and the latter's son King Henry VI (1422–1471).