+ Elizabeth ? (b. 1797) ↑
   + Caroline Aldridge (b. 1827) ↑
   + Samuel Males (b. 1859) ↑
   + Arthur Harry Threader (b. 1879, bp. 1880) ↑
   + Milo Henry Billyard (b. 1902) ↑
   + Gertrude Alexandra (Zandra) Crysler (b. 1927) ↑
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 4 May 2025 by Andrew Billyard
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