Francis Richard Charteris, 10th Earl of Wemyss GCVO DL (pronounced weems, rhyming with seems) (4 August 1818 – 30 June 1914), styled as Lord Elcho between 1853 and 1883, was a British Whig politician.

As Lord Elcho he was commanding officer of the London Scottish Rifles Volunteers regiment for 17 years from its formation in 1859, gaining the rank of Lieutenant-Colonel.

[2] He developed an interest in the alternative medical practice of Homeopathy, even becoming President of the London Homeopathic Hospital until his death.

The strength of his belief is evidenced by his writing in March 1914: I wish all success to Homoeopathy, to which I attach my physical well-being in great measure.

[4] Together, they were the parents of six sons and three daughters, including:[1] After the death of his first wife on 22 Jul 1896, he remarried, to Grace Blackburn (c. 1857–1946) in December 1900.

[6] Charteris Bay in Lyttelton Harbour was chosen as a locality name to commemorate his role in the settlement of Canterbury in New Zealand.