(ABT 1843-26 JUL 1896)
| | +---George Jeffery (1804-)
| +---Harriet Jeffery 
(1824-)
| +---Harriet ?
+---William Jefferys (27 DEC 1877-16 NOV 1918)
| | +---John Hagarty
| +---Margaret Hagarty (01 AUG 1843-21 MAR 1898)
| +---Martha Hudson
William James Jefferys (27 FEB 1906-20 JUL 1968)
| +---Ralph Polkinghorne
| +---Ralph Polkinghorne (02 JUL 1697-)
| | | +---James Harrye (-ABT 1598)
| | | +---Bennett Harry alias Angarrack (ABT 1568-ABT 1624)
| | | | +---Alson ? (-ABT 1606)
| | | +---John Harry alias Angarrack (ABT 1591-ABT 1668)
| | | | +---Chesten Whita (-ABT 1652)
| | | +---Richard Harry of Angarrack (ABT 1621-ABT 1686)
| | | | | +---William Michell
| | | | +---Elizabeth Michell (-ABT 1626)
| | +---Mary Harry (1660-ABT 1733)
| | | +---Richard Wills (-ABT 1631)
| | +---Emblem Wills
| | | +---James Harrye (-ABT 1598)
| | | +---Bennett Harry alias Angarrack (ABT 1568-ABT 1624)
| | | | +---Alson ? (-ABT 1606)
| | +---Alson Harry (ABT 1601-)
| | +---Chesten Whita (-ABT 1652)
| +---Ralph Polkinghorne (ABT 1728-)
| | +---Elizabeth Richards
| +---Asdrueal Polkinghorne (05 JUL 1767-)
| | +---Christian Rodda
| +---William Polkinghorne (ABT 1802-)
| | | +---William Bartle
| | +---Elizabeth Bartle (ABT 1769-)
| | +---Sidwell Abraham
| +---James Polkinghorne (03 MAY 1833-23 OCT 1906)
| | | +---Richard Edwards (ABT 1660-)
| | | +---Nicholas Edwards (ABT 1735-SEP 1788)
| | | | +---Grace Richards (09 AUG 1697-AUG 1758)
| | | +---Nicholas Edwards (ABT 1769-)
| | | | +---Honour Moon (1743-)
| | +---Honour Edwards (27 MAY 1804-)
| | +---Margaret Langon
| +---William Polkinghorne (29 JUL 1857-02 JUL 1928)
| | | +---Moses Thomas (ABT 1753-APR 1819)
| | | +---Edward Thomas (30 DEC 1799-)
| | | | +---Mary Berryman
| | +---Christiana Thomas (07 DEC 1834-09 OCT 1919)
| | +---Elizabeth Harvey
+---Ethel May Polkinghorne (29 NOV 1882-18 NOV 1918)
| +---James Trethewy
| +---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)
| +---William Trethewy (ABT 1768-)
| | | +---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 ?
| +---Richard Trethewey (01 MAR 1809-JAN 1893)
| | | +---John Harper
| | +---Sarah Harper (ABT 1772-)
| | +---Elizabeth Cullin
| +---William Trethewey (ABT 1831-BEF FEB 1879)
| | +---Mary Ann Edmonds (-NOV 1831)
+---Ellen Davies Trethewey (07 SEP 1857-20 FEB 1937)
| +---William Davies (ABT 1806-)
+---Mary Elizabeth Davies (29 JUN 1839-)
| +---James Searle (ABT 1763-)
+---Dorothy (Dot) Searle (ABT 1810-BEF 1871)
| +---Benjamin Truscott (ABT 1660-)
| +---Alexander Truscott (ABT 1681-1759)
| +---Lewis Truscott (ABT 1707-AUG 1780)
| | +---Phillippa Croull (ABT 1670-JUN 1743)
| +---Lewis Truscott (ABT 1740-23 AUG 1819)
| | | +---John Harris (BEF 1686-)
| | +---Ann Harris (ABT 1713-)
| | +---Jane Paul (BEF 1686-)
+---Elizabeth Truscott (ABT 1785-)
+---Florence Hicks (1742-23 AUG 1819)