Sir Colin Mackenzie of Coul, 4th Bt. (died 1740) (d. 1740) Parents Sir Alexander Mackenzie of Coul, 2nd Bt. Janet Johnston Children Sir Alexander Mackenzie of Coul, 5th Bt. Anne Mackenzie William Mackenzie of Achilty and Kinnahaird Siblings unknown daughter Mackenzie unknown daughter Mackenzie Janet Mackenzie Sir John Mackenzie of Coul, 3rd Bt. unknown Mackenzie Partners Henrietta Houston