+ Mary ? (b. 1831) ↑
   + Ellen Clark (b. 1861) ↑
   + Arthur Harry Threader (1879, bp. 1880-1925) ↑
   + Milo Henry Billyard (b. 1902) ↑
   + Gertrude Alexandra (Zandra) Crysler ↑
   - Margaret (Peg) Eberle ↑
   - John Parsons ↑
   + Cornelia (Neila) Rose ↑
   + Robertson (Rob) MacDonald ↑
   + Evelyn Kathleen (Billyard) Dawe ↑
   - Rhonda Gail Arsenault ↑
   + spouse unknown
   + Harvey Glen Mumby ↑
Legend:
A number prefix represents generation number.
Dotted lines indicate adoptive or step relations.
Names in parenthesis are either aliases or names commonly associated with person
Last updated 21 Aug 2023 by Andrew Billyard
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