Honorary Membership was limited to 10 from 1890-1900, and to 15 from 1901 onwards. Corresponding Membership was a lesser class of Honoris causa membership in the early years. A few honorary members, such as Barnard, were first made corresponding members for a short time before being recommissioned as honorary members.
Nation(s) |
Start | End | |
|---|---|---|---|
| Shearmen, Mr. T.S.H. | Canada | 1890 | 1900 |
| King, Dr. William Frederick | Canada | 1892 | 1916 |
| McLeod, Dr. Clement Henry | Canada | 1894 | 1917 |
| Russell, Rev. Norman H. | Canada/India | 1898 | 1902 |
| Plaskett, Prof. Harry H. | Canada/United Kingdom | 1961 | 1979 |
| Morrison, Dr. Joseph | Canada/USA | 1891 | 1898 |
| Mitchell, Prof. Samuel | Canada/USA | 1958 | 1960 |
| Strömgren, Prof. Bengt G. | Denmark | 1968 | 1987 |
| Hertzsprung, Prof. Ejnar | Denmark | 1946 | 1967 |
| Hawking, Dr. Stephen W. | England | 1985 | 2018 |