Searching Scotland's People, I found a birth for the right year and location but the date is a bit off. Could be him??
SUTHERLAND WILLIAM son of DAVID SUTHERLAND/ISOBEL ALLAN M 21/02/1770 036/ 10 34 Dunnet Dudgeon-166 13:45, 12 January 2022 (UTC)
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.
S > Sutherland > William Sutherland
Categories: Red River Colony | Dunnet Parish, Caithness