Dean Henry Thomas (born Dean Henry Black; 7 January 1980) was a half-blood wizard and son of pure-blood wizard Regulus Black and his Muggle wife, Jennifer. Born at the height of the British Wizarding Civil War, Regulus left Dean and his wife in order to shelter them from the war. Dean's mother later remarried Henry Thomas, a Muggle banker, and was graced with three half-sisters; Sophie, Ava and Chloe Thomas, and Dean took his stepfather's last name.