Hugh Montgomerie, 3rd Earl of Eglinton (c. 1531 – 1585) was a Scottish aristocrat who was a strong supporter of Mary Queen of Scots.
However, as a practicing Catholic, Montgomerie was a frequent target of criticism by Protestant clerics, and was said to attend daily mass and had a priest on his personal staff.
In December 1560, soon after the death of Mary's teenage husband, Francis II of France, Montgomerie signed a pledge of support for her in a meeting at Dunbar Castle.
On 19 August Parliament declared Montgomerie guilty of treason for failing to turn over his castles to the victor.
In May 1571 he finally swore allegiance to the Matthew Stewart, 4th Earl of Lennox, the regent for the young king James VI.
[1] Like many aristocrats she had lent a large sum of money, 11,000 merks, to the goldsmith and financier Thomas Foulis and merchant Robert Jousie.