Prof William Mackay Davidson FRSE RSM (1909–1991) was a Scottish pathologist, haematologist and expert on human chromosomes.
As a member of the Territorial Army he was immediately called up at the onset of the Second World War in September 1939 and served with the 153rd Field Ambulance attached to the Highland Division.
In 1940 he was captured at St Valery-en-Caux as part of the famous British surrender to Rommel on the northern French coast.
After a brief return to Aberdeen University he was offered the post of Senior Lecturer in Haematology at King's College Hospital Medical School in London in 1948 and in 1957 was granted a full Professorship there.
His proposers were Matthew Sydney Thomson, Cecil Wakeley, David Campbell, Sir Stanley Davidson, George Lightbody Montgomery, and John Stirling Young.