Lawrence Gwyn Van Loon (1903, New York City - 7 November 1985, Gloversville, New York)[1] was an American general practitioner, amateur historical linguist and forger.

He learned the remains of the Mohawk Dutch language, the taol, from his maternal grandfather, Walter Hill (1856-1925), a schoolteacher.

At the age of ten he went to Reading, New York, for a journey to the Mohawk Valley.

In 1980 it was established that work of Van Loon was based on forged documents.

Van Loon married to Grietje Prins in Aalsmeer on 25 August 1932.