Robert M. Stothart was born in Scotland in about 1766 in Dumfries, Midlothian, Scotland ( so we think). He came to America with his brother (Possibly a Twin) named William. They also had a sister named Isabelle Stothart who married a Christopher Tennant. Isabelle and Christopher came to America after being married.
I can find Robert in America as late as 1799, and being married to Elizabeth Paterson on May 25, 1795.
I have only been able to search the Web as that I don't have the resources to make it over to scotland to look him up in parish records.