This is the family of Hugh McMurtrie who had children in Ladyburn, Kirkmichael beginning with Andrew b 1771.
We suspect this is Hugh b 1743 son of John b 1718 of Barr Parish. This Hugh b 1743 had a twin brother James and an older brother Robert b 1740. We suspect that all three left Barr and came north, Robert being the Robert who settled near Old Dailly by 1738, James marrying in 1768 in Dailly, and Hugh coming north to Ladyburn.
See "McMurtries of Barr" and "McMurtries of Dailly" for more details.
Ancestors and Descendants of CF 021