- Clifford Ernest Hyde (b. 1896) ↑
   - Elmer Gordon ↑
   + James (Jim) Watson ↑
   + Stuart Keith (Tony) McKay ↑
   + James (Jim) Watson ↑
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 1 Nov 2023 by Andrew Billyard
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