Thomas of Lancaster, 1st Duke of Clarence, KG (1387 – 22 March 1421), also known as Thomas Plantagenet, was the second son of King Henry IV of England and his first wife, Mary de Bohun. He was born before 25 November 1387 as on that date his father's accounts note a payment made to a woman described as his nurse. Sandals and clothes were bought for him early in 1388,[citation needed] so the traditional birth date of 29 September 1388 may be safely discounted.