General Lord Mark Ralph George Kerr GCB (15 December 1817 – 17 May 1900) was a British Army officer who served in the Crimean War and in India.

[1] Kerr was born in his ancestral home (Newbattle Abbey), in Midlothian, Scotland in 1817; the son of William Kerr, 6th Marquess of Lothian and his second wife Lady Harriet Scott (daughter of the 3rd Duke of Buccleuch).

Kerr was commissioned (by purchase) into the army on 19 June 1835 as an Ensign in the 20th (East Devonshire) Regiment of Foot[2][3] and served in the Crimean War and various campaigns in India,[4] including the Indian Mutiny.

From 1842 to 1853 Kerr served with his regiment, which was a reserve battalion stationed in Bermuda and Canada.

[5] His military career summary is as follows:[6] The Kerr family's association with the 13th Light Infantry was a longstanding one, as an earlier Lord Mark Kerr had a colonelcy in the regiment in its early years.