| Full name: | George Reginald Edward Gray Mackay |
| Born: | 20th July 1885, Edinburgh, Midlothian, Scotland |
| Died: | 20th November 1965, Merton, Surrey, England |
| Education: | Merchiston Castle School; Edinburgh University |
| Occupation: | Doctor |
| Other Sports: | Rugby |
| Teams: | Merchiston Castle School (Miscellaneous: 1902-1903) |
| Lists of matches and more detailed statistics | |