He married Mary Elizabeth Hutchinson in Wheldrake on September 24, 1913. They had the following children:
- Mary Ann Fairburn*
- Johnson Fairburn
- May Fairburn
- George Fairburn
- Gladys Winifred Fairburn
Seth died in Yorkshire in 1945, at the age of 69.
* For my most distant cousins (the ones not descended from the William Warner who married Hannah Benson and emigrated to Canada in the 1820s), this website (for the time being) only expands the family lines that have been supported by DNA evidence. In the case of this family, only Mary Ann Fairburn’s line meets that criterion.