Mary of Great Britain (5 March 1723 – 14 January 1772) was the second-youngest daughter of George II of Great Britain and his wife, Caroline of Ansbach, and Landgravine of Hesse-Kassel as the wife of Frederick II, Landgrave of Hesse-Kassel.

She was supported by her father-in-law, who provided her with a residence in Hanau, as she did not wish to return to Great Britain, but to stay on the continent to raise her children.

[4] In 1756, Mary moved to Denmark, to take care of the children of her sister Louise of Great Britain, who had died in 1751.

She took her children with her, and they were raised at the royal court and her sons were married to Danish princesses.

[5] On 30 August 1727, as a child of the sovereign, Mary was granted use of the arms of the realm, differenced by a label argent of three points, each bearing a canton gules.