Henry Stuart, Lord Darnley not together in early 1545 and a letter of March 1566, from Mary Queen of Scots, indicates Darnley was then nineteen years old. Therefore the date 1546 would seem probable. A descendant of both James II of Scotland and Henry VII of England, Henry Stuart, Lord Darnley, was heir to two royal houses, the House of Stuart and the House of Tudor, thus he had claim to both the Scottish and English thrones, a claim that may have cost him his life. In 1545, his father, Matthew Stewart, 4th Earl of Lennox was found guilty of treason in Scotland for
Earl of Darnley in the County of Meath. In 1723 the Darnley title held by his wife's ancestors (which had become extinct on the death of Charles Stewart, 6th Duke of Lennox and 6th Earl of Darnley in 1672) was revived when he was created Viscount Darnley, of Athboy in the County of Meath, in the Peerage of Ireland. In 1725 Bligh was further honoured when he was advanced as Earl of Darnley, in the County of Meath, also in the Peerage of Ireland. He was succeeded by his eldest son, the second Earl. He had already succeeded his mother in 1722 as