(ABT 1517-ABT 1573)
+---Thomas Trethewy (-ABT 1616)
+---Bartholomew Trethewy
+---Bartholomew Trethewy (-1666)
+---Bartholomew Trethewy
+---Thomas Trethewy (ABT 1675-MAY 1743)
| +---Jane Bruart 
+---William Trethewy (ABT 1712-JAN 1777)
| | +---Phillip Mellow (ABT 1660-JAN 1711)
| +---Joan Mellow (ABT 1680-)
| +---Jane ?
+---Richard Trethewy (ABT 1753-MAR 1836)
| +---Grace Rickard
+---William Trethewy (ABT 1795-)
| | +---John Cundy
| | +---Solomon Cundy (ABT 1690-DEC 1759)
| | +---William Cundy (ABT 1733-)
| | | | +---David Pearce
| | | | +---Isaack Pearce (ABT 1666-)
| | | | | +---Alice ?
| | | +---Alice Pearce (ABT 1698-NOV 1739)
| | | +---Alice ?
| +---Susanna Cundy (ABT 1761-)
| +---Jane Treneman (ABT 1737-ABT 1809)
Mary Ann Trethewy (ABT 1837-)
| +---Richard Bunt (1580-16 AUG 1657)
| +---Patrick Bunt (28 NOV 1602-29 SEP 1679)
| | +---Thomasine Edwards (ABT 1580-01 MAY 1653)
| +---Amos Bunt (13 JAN 1632-14 MAR 1666)
| | +---Louisa Wilcock (28 FEB 1600-25 MAY 1651)
| +---Hezekiah Bunt (11 SEP 1661-1725)
| | +---Lore Burt (ABT 1640-03 DEC 1708)
| +---Amos Bunt (07 FEB 1692-22 JAN 1751)
| | +---Joanna Deacon (ABT 1661-BEF 1718)
| +---Hezekiah Bunt (1733-11 NOV 1811)
| | +---Frances ?
| +---Hezekiah Bunt (1766-13 MAY 1846)
| | +---Jane Davies (1728-23 OCT 1819)
+---Jenifer Bunt (ABT 1803-)
+---Ann ? (ABT 1767-)