+---Richard Trethewy (ABT 1665-JAN 1741)
+---Richard Trethewy (ABT 1700-ABT 1764)
| +---Ann Martyn 
(ABT 1666-JUN 1738)
+---Richard Trethewy (ABT 1728-21 APR 1818)
| | +---Humphrey Harris
| | +---Gilbert Harris (ABT 1637-)
| | +---Gilbert Harris (ABT 1665-)
| | | | +---Richard Wills
| | | +---Jenifer Wills (ABT 1632-)
| | | +---Christian Best
| +---Jenifer Harris (ABT 1696-1780)
| | +---Thomas Hockin (-ABT 1607)
| | +---John Hockin
| | | +---Elizabeth ?
| | +---John Hockin
| | +---John Hockin (ABT 1616-DEC 1696)
| +---Elizabeth Hockin (ABT 1658-)
| +---Blanche ? (-ABT 1699)
+---Thomas Trethewey (ABT 1759-11 JUN 1846)
| | +---David Warne
| | +---John Warne (ABT 1656-)
| | | | +---Henry Arthur
| | | | +---Gregory Arthur (ABT 1599-)
| | | +---Honor Arthur (ABT 1632-)
| | +---John Warne (ABT 1700-)
| | | | +---Richard Rounsevall
| | | | +---Gregory Rounsevall (ABT 1617-)
| | | | | +---Jane ?
| | | +---Jane Rounsevall (ABT 1664-)
| | | +---Mary Olver
| +---Mary Warne (ABT 1730-30 MAY 1786)
| | +---Johannes Doketon
| | +---John Doketon (BEF 1459-)
| | +---Thomas Doketon (BEF 1490-)
| | +---Richard Docton (-JAN 1571)
| | | +---Alicia Ash (BEF 1490-)
| | +---Thomas Docton (-AUG 1638)
| | | +---Thomasin Saunder
| | +---John Docton (ABT 1600-JUN 1650)
| | | +---Susanna (Susan) Babacom (-DEC 1634)
| | +---John Docton (ABT 1636-)
| | | | +---John Arundell of Lanherne
| | | | +---Thomas Arundell of Lanherne
| | | | | | +---Gerald Danet
| | | | | +---Elizabeth Danet
| | | | +---Thomas Arundell (-AFT 1620)
| | | | | +---Elizabeth Trengove of Nance
| | | +---Cecilia Arundell (-MAR 1639)
| | | +---Rachell Monp'son
| +---Honor Docton (ABT 1700-)
| | +---Thomas Tregeare
| | +---Henry Tregeare (ABT 1609-)
| +---Mary Tregeare (ABT 1655-)
| +---Mary ?
+---Samuel Trethewey (ABT 1793-14 MAR 1875)
| | +---James Trethewy (ABT 1517-ABT 1573)
| | +---Thomas Trethewy (-ABT 1616)
| | +---Bartholomew Trethewy
| | +---Bartholomew Trethewy (-1666)
| | +---Thomas Trethewey (-ABT 1692)
| | +---Bartholomew Trethewy (ABT 1667-MAY 1755)
| | +---Walter Trethewy (ABT 1702-NOV 1751)
| | | | +---Robert Trethewey (-JUL 1676)
| | | | +---Walter Trethewey (-1710)
| | | +---Elizabeth Trethewey (ABT 1670-AUG 1743)
| | | +---Mary Brewer
| | +---Humphrey Betty Trethewey (ABT 1731-JUL 1769)
| | | +---Joan Woon (-1735)
| +---Jane Trethewey (01 OCT 1764-05 JUL 1846)
| | +---Richard Hendra
| +---Blanche Hendra (ABT 1734-JAN 1775)
| +---Jane Murton
+---Joseph Trethewey (ABT 1832-23 MAR 1895)
| +---Maria Snell (-NOV 1837)
Jane Trethewey (ABT 1869-)
| +---John Pinch (ABT 1515-)
| +---Thomas Pinch (ABT 1540-)
| +---John Pinch (ABT 1563-)
| | +---Jone Hicks
| +---Philip Pinch (ABT 1590-MAY 1675)
| | +---Margaret West
| +---Philip Pinch (ABT 1637-21 JUN 1725)
| | +---Joanna ? (-OCT 1684)
| +---William Pinch (1674-08 MAY 1744)
| | +---Tamsin ? (-1726)
| +---William Pinch (ABT 1708-1787)
| | +---Sarah Williams
| +---Philip Pinch (ABT 1755-OCT 1833)
| | +---Grace ? (-11 DEC 1788)
| +---James Pinch (ABT 1782-SEP 1819)
| | +---Ann Nicholls (1752-07 APR 1840)
| +---Thomas Pinch (ABT 1815-DEC 1898)
| | +---Jennifor Phillips (1782-03 OCT 1836)
+---Rebecca Pinch (ABT 1839-1890)
+---Mary Ann Quintraila (1818-21 OCT 1858)