From Fort Ligonier's museum:

Field Marshal John Ligonier
By Sir Joshua Reynolds, c. 1760, Oil on Canvas
John Lewis Ligonier (1680-1770) was a French Huguenot refugee who emigrated to England and entered the British army as ensign, rising to field marshal. Never in North America, he fought in several wars for Britain and was made commander in chief of all land forces in 1757, replacing Cumberland. Ligonier ably managed the army and advised the ministry on Seven Years' War (1756-1763) strategy until 1763. He received most of the available British high honors for his service. General John Forbes renamed the Post at Loyalhanna, "Fort Ligonier," after him, in 1758.