I have a Robert Clugston as a Child of Joseph Clugston b. 1740 d. 1798 m. Jane ---.He is the4th child in family of 7. Older Brother David Clugston is my 2nd Great-grandfather. Ihave no info except the name on Robert, but the birthdate you show (1775) might fit. If this connects,I have info on Joseph's father & family back to 1715 in Northern Ireland. will send details if this is of interest.