John Victor Nash (born 14 June 1891, date of death unknown) was an Argentine bobsledder.
In 1919 Nash married Jean Gazlay Sifton (née Donaldson), the third of her six marriages, and they spent the following years in London.
Only a short time after their wedding she had accumulated bills for dresses, shoes and furs for hundreds of thousands of dollars.
During the divorce case the judge reportedly called her the best dressed and most extravagant woman in the world.
Even though probably still a British citizen he joined the Argentinian bob team at St. Moritz in 1928, which did exceptionally well, missing the bronze medal by only 0.7 seconds.