+---Henry Williams (ABT 1806-JUN 1843)
| +---Margaret ? 
Martha Williams (ABT 1836-)
| +---Alexander Bone
| +---Thomas Bone (ABT 1780-JAN 1844)
| | +---Rebecca Boney
+---Elizabeth (Betsy) Blackmore Bone (ABT 1810-)
| +---William Blackmore
+---Frances (Fanny) Blackmore (ABT 1781-MAR 1849)
| +---Peter Birt
+---Grace Seage Burt (ABT 1755-)
| +---John Tregenza
+---Mary Tregenza (ABT 1725-)
+---Grace Seage