William James Cowan
m. Sarah Ann Downey
|\
| William James Cowan
| m. Helena Campbell
| |\
| | Madeleine Florence Cowan
| \
| Gladys Cowan
|\
| George Henry Cowan
| m. Muriam Eliza Armstrong
| \
| Irene Mildred Cowan
|\
| John Edmund Cowan
| m. Maude Barber
| \
| Earle Cowan
|\
| Thomas Wellington Cowan
| m. Amelia Elizabeth Vance
| |\
| | Dorthy Florence Cowan
| \
| Verna Mary Cowan
|\
| Clement Cowan
| m. Violet Geddes
| |\
| | Lyle Cowan
| \
| Muriel Cowan
\
Lila Maude Cowan
m. J. Wilmot Humphreys
Please note: Information on this page may be incomplete; all references to the living have been removed.