Lord Henry Stewart or Stuart, 1545–67, Scottish nobleman: second husband of Mary Queen of Scots (father of James I of England).
British Dictionary definitions for h.s. darnley
Lord. title of Henry Stuart (or Stewart). 1545--67, Scottish nobleman; second husband of Mary, Queen of Scots and father of James I of England. After murdering his wife's secretary, Rizzio (1566), he was himself assassinated (1567)