Gregor MacGregor was the grandson of Gregor MacGregor, the Scotchman, who enlisted in the Black Watch, then Semphill’s Highlanders, and was called in Gaelic “Gregor, the Beautiful.” When the regiment was first ordered to England, in 1743, “Gregor, the Beautiful” and two others were sent on in advance to London, so that the king of England, who was on the point of starting for the continent, might see some soldiers of the regiment before leaving. One of the men died en route, but MacGregor and the other were paraded before the king at St. James’s and gave an exhibition of their dexterity with the broadsword and Lochabar axe. Both afterwards rose to commissions. MacGregor subsequently joined another regiment. He finally left the army and became Laird of Inverardine.
Davis, T. Frederick
"MacGregor’s Invasion of Florida,"
Florida Historical Quarterly: Vol. 7
, Article 5.
Available at: https://stars.library.ucf.edu/fhq/vol7/iss1/5