Major-General Sir John Mark Frederick Smith was a British general and colonel-commandant of the Royal Engineers. He was also the Conservative Member of Parliament for Chatham from 1852 to 1853 and 1857 to 1865. He was a Gentleman Usher and Fellow of the Royal Society.

The Royal Guelphic Order, sometimes referred to as the Hanoverian Guelphic Order, is a Hanoverian order of chivalry instituted on 28 April 1815 by the Prince Regent. It takes its name from the House of Guelph, of which the Hanoverians were a branch. Since Hanover and the United Kingdom shared a monarch until 1837, the order was frequently bestowed upon British subjects.