(ABT 1730-22 MAY 1807)
+---William Rescorle (20 JUN 1762-)
| | +---William Testick (25 APR 1696-)
| +---Margery Testick 
(14 MAY 1732-08 JUN 1794)
| +---Elizabeth Seccombe
Elizabeth Rescorle (1797-)
| +---William Testick (25 APR 1696-)
| +---William Testick (ABT 1735-)
| | +---Elizabeth Seccombe
+---Susanna Testick (14 OCT 1770-)
| +---Nicholas Trevithick (ABT 1618-FEB 1698)
| +---Thomas Trevithick (ABT 1664-MAR 1723)
| | | +---Thomas Couch
| | +---Peternell Couch (ABT 1640-DEC 1696)
| | +---Elizabeth ?
| +---Thomas Trevithick (ABT 1697-FEB 1771)
| | | +---John Peters (ABT 1639-)
| | +---Mary Peters (ABT 1665-)
| | +---Marrian Spry (ABT 1643-)
+---Susanna Trevithick (ABT 1740-)
| +---John Bennett (ABT 1680-JAN 1717)
+---Mary Bennett (ABT 1706-1742)
+---Pricilla ? (ABT 1680-)