+---George Tonkin (1758-)
| +---Jane ? 
+---James Prout Tonkin (ABT 1800-)
| +---Jennifer (Jane) Prout
+---William Tonkin (ABT 1831-)
| +---Jane Tredinnick
Charles Edward Tonkin (ABT 1856-)
| +---Joseph Wills
+---Eliza Wills (ABT 1828-)
+---Martha ?