James Hamilton, 1st Duke of Hamilton, Scottish soldier and politician, Lord Chancellor of Scotland (d. 1649)

James Hamilton, 1st Duke of Hamilton, KG, PC (19 June 1606 – 9 March 1649), known as The 3rd Marquess of Hamilton from March 1625 until April 1643, was a Scottish nobleman and influential political and military leader during the Thirty Years' War and the Wars of the Three Kingdoms.