Christoph Samuel John

Christoph Samuel John (11 August 1747 – 1 September 1813) was a German missionary in the service of the Danish-Halle Mission in southern India at the Danish settlement of Tranquebar (Tharangambadi). He promoted schools, natural theology, and collected specimens of local natural history which he sent to collaborators and several species have been named from his collections including the plant Impatiens johnii, the snake Eryx johnii and the fish genus Johnius and the species Lutjanus johnii.