Louis De Rougemont (12 November 1847 – 9 June 1921) was a Swiss explorer who claimed to have had adventures in Australasia.

[1] "De Rougemont" was born Henri Louis Grin in 1847 in Gressy, Vaud, Switzerland.

He became a footman to the actress Fanny Kemble, servant to a Swiss banker de Mieville in 1870 and a butler for the Governor of Western Australia, Sir William Robinson.

In 1898 he began to write about his invented adventures in the British periodical The Wide World Magazine[2] under the name Louis De Rougemont.

He described his alleged exploits in search of pearls and gold in New Guinea, and claimed to have spent thirty years living with Indigenous Australians in the outback.

He claimed that he could not specify exactly where he had been because he had signed a non-disclosure agreement with a syndicate that wanted to exploit the gold he had found in the area.

Grin tried to defend himself by writing a letter to The Daily Chronicle, using his original name, in which he expressed his consternation that anybody would confuse him with Louis De Rougemont.