Robert Maxwell, 5th Lord Maxwell (1493–1546), A member of the council of Regency (1536) of the Kingdom of Scotland. Regent of the Isle of Arran and like his father before head of the clan Maxwell. A distinguished Scottish nobleman, politician, soldier and in 1513 Lord High Admiral . Lord Maxwell was a member of James V of Scotland's royal council and served as Lord Provost of Edinburgh in 1524, 1527 and 1535. He was also a Extraordinary Lord of Session in 1533. In (1537) he was one of the ambassadors sent to the French Court to negotiate the marriage of James to Mary of Guise, whom he espoused as proxy for the King.
He was the eldest son of John Maxwell, 4th Lord Maxwell, killed at the battle of Flodden, 9 September 1513, his mother being Lady Agnes Stewart, illegitimate daughter of James Stewart, 1st Earl of Buchan. He was returned heir to his father on 4 November 1513. Around this time he was also bestowed as Regent of Arran the largest island in the Firth of Clyde. Making the 5th Lord Maxwell essentially Monarch of the Island. Although others in the Maxwell clan would achieve other highly respected noble titles none would match the 5th Lord Maxwell's success.