Mackenzie, John (1803–1886), physician and landowner, was born in Scotland on 23 November 1803, the fourth of the five sons of Sir Hector Mackenzie of Gairloch, fourth baronet (1758–1826), and his second wife, Christian, née Henderson. He was educated at Edinburgh University, graduating as a physician (DM) in 1824, and as a surgeon in 1825; he became a lifelong friend of ...