Antoine-Hippolyte Cros (10 May 1833 – 1 November 1903) was a French surgeon and pretender to the throne of the defunct Kingdom of Araucanía and Patagonia.

Antoine-Hippolyte was married in Paris on 5 March 1856 to Leonilda Méndez de Texeira, an aristocratic lady of Portuguese origin.

[4] On 28 August 1873 the Criminal Court of Paris ruled that Antoine de Tounens, first "king of Araucania and Patagonia" did not justify his status of sovereign.

[5] The pretenders to the throne of Araucania and Patagonia are called monarchs and sovereigns of fantasy,[6][7][8][9][10] "having only fanciful claims to a kingdom without legal existence and having no international recognition".

[11] Since the death of Antoine de Tounens, some French citizens without familial relations declared themselves to be pretenders to the throne of Araucania and Patagonia.