great-granddaughter Margaret Beaufort was the mother of Henry VII, who claimed the throne as the representative of the Lancastrian line. Edmund of Langley, 1st Duke of York (1341–1402), fifth son (fourth surviving son), born at Kings Langley Palace, Hertfordshire. He married firstly the Infanta Isabella of Castile, by whom he had issue, sister of the Infanta Constance of Castile, second wife of his elder brother John of Gaunt, 1st Duke of Lancaster. Secondly in 1392 he married his second cousin Joan Holland, without issue. His great-grandson (the 4th Duke of York) became King EdwardIV in 1461, having deposed his half-second cousin the Lancastrian King HenryVI. EdwardIV's daughter Elizabeth of York was mother of King HenryVIII. Thomas of Windsor (1347–1348), sixth son, born at Windsor Castle, died in infancy of the plague and was buried at King's Langley Priory, Hertfordshire. William of Windsor (1348–1348), seventh son, born before 24 June 1348 at Windsor Castle, died in infancy probably on 9 July1348, buried on 5 September 1348 in Westminster Abbey; Thomas of Woodstock, 1st Duke of Gloucester (1355–1397), eighth son (fifth surviving son), born at Woodstock Palace in Oxfordshire; in 1376 he married Eleanor de Bohun, by whom he had issue. His eventual heir was the Bourchier family, Earls of Bath, of Tawstock in Devon, today represented by the Wrey baronets, who quarter the arms of Thomas of Woodstock and continue as lords of the manor of Tawstock. Daughters Isabella of England (1332–), born at Woodstock Palace, Oxfordshire, in 1365 married Enguerrand VII de Coucy, 1st Earl of Bedford, by whom she had issue. Joan of England (1333/4–1348), born in the Tower of London; she was betrothed to Peter of Castile but died of the black death en route to Castile before the marriage could take place. Peter's two daughters from his union with María de Padilla married Joan's younger brothers John of Gaunt, Duke of Lancaster and Edmund of Langley, 1st Duke of York. Blanche (1342–1342), born in the Tower of London, died shortly after birth and was buried in Westminster Abbey. Mary of Waltham (1344–1361), born at Bishop's Waltham, Hampshire; in 1361 she married John IV, Duke of Brittany, without issue. Margaret (Countess of Pembroke) (1346–1361), born at Windsor Castle; in 1359 she married John Hastings, 2nd Earl of Pembroke, without issue. Genealogical tables Contemporaries and the Hundred Years' War Edward's relationship to contemporary kings of France, Navarre, and Scotland