James was the only son of Mary Queen of Scots ,and her second husband . Henry Stuart lord Darnley . both Mary and Darnley were great grandchidren of Henry
James vi and 1 was king of Scotland as James vi from 24 July in 1567 and king of England and Ireland.
As James 1 from the Unon of the Scottish and England crowns no 24 March 1603 until his death in 1625