???? - 1775
Son of Patrick Grant, Lord Elchies (1694-1750) and brother of Andrew Grant (q.v.). According to the ODNB entry for Patrick Grant, John Grant died in 1775 in Grenada 'where he had extensive sugar estates.' These estates have not been directly identified by LBS but might include River Antoine, held by his brother and heir Andrew Grant at the latter's death c. 1779.
Hamilton, J. A., and Anita McConnell. 2004 "Grant, Patrick, Lord Elchies (1690–1754), judge." Oxford Dictionary of National Biography. 25 Jun. 2019. https://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-11280.