Sir Everard Ferdinand im Thurn KCMG KBE CB FRAI (9 May 1852 – 9 October 1932) was an author, explorer, botanist, photographer and British colonial administrator.

In December 1884 he led the first successful expedition to the summit of Mount Roraima, in Venezuela's Gran Sabana region, along with Harry Perkins, an Assistant Crown Surveyor who was also living in British Guiana.

He was a keen photographer and author of several works related to his expedition to Roraima, which were published in scientific journals, including: "The Botany of Roraima Expedition of 1884: being notes on the plants observed; with a list of the species collected, and determinations of those that are new" (Linnean Society, 1887), and "Among the Indians of Guiana: being sketches, chiefly anthropologic from the interior of British Guiana, etc.

[9] He was appointed a Knight Commander of the Order of the British Empire (KBE) in the 1918 New Year Honours, at which time he was vice-chairman of the King George and Queen Mary's Club for Overseas Forces.

In 1886, he was honoured by English botanist Henry Nicholas Ridley, who named a genus of plants from tropical South America after him:[13] Everardia, in the family Cyperaceae.