Thomas of Lancaster, 1st Duke of Clarence [SEP] father
Thomas of Lancaster, 1st Duke of Clarence
Thomas of Lancaster, 1st Duke of Clarence (autumn 1387 – 22 March 1421) was a medieval English prince and soldier, the second son of King Henry IV of England and brother of Henry V. He acted as councillor and aide to both. After the death of his father he participated in the military campaigns of his brother in France during the Hundred Years' War. 
Heir to the throne in the event of his brother's death, he was left in charge
, and was granted by King Henry V (1413–1422) in wardship to Thomas of Lancaster, 1st Duke of Clarence (1387–1421), the King's eldest brother. Thomas married young, no doubt at the direction of Clarence, and had a daughter Margery Russell, but father and daughter both died, in mysterious circumstances, in 1431, Thomas aged about 18, certainly still a minor. The elderly Sir John Stradling (died 1435) of Glamorgan, Wales, obtained the marriage of Joan the young widow, yet omitted