+ Caroline ? (b. 1854) ↑
   + Martin Tilney Richman (b. 1875) ↑
   + Gustav Henry Horswill (b. 1887) ↑
   + Robert Harris ↑
   - Sherry Rutherford ↑
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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