(ABT 1674-)
+---Edward Arthur (ABT 1704-)
| +---Joan Hicks 
(ABT 1676-)
+---John Arthur (ABT 1735-)
| | +---William Row
| +---Catherine Row (ABT 1714-)
| +---Catharine Mitchell
+---Edward Arthur (ABT 1763-)
| | +---John Yelland (ABT 1683-SEP 1714)
| | +---Richard Yelland (ABT 1714-)
| | | +---Elizabeth Chapman
| +---Mary Yelland (ABT 1741-JUN 1814)
| | +---John Thomas (ABT 1676-ABT 1745)
| +---Rebecca Thomas (ABT 1722-)
| | +---Nicholas Phillips (BEF 1664-)
| +---Mary Phillips (ABT 1684-)
| | +---John Mock (-OCT 1609)
| | +---Lancelot Mock (-FEB 1631)
| | | +---Joan ? (-OCT 1609)
| | +---John Mock (ABT 1601-ABT 1675)
| | | +---Joan Webber (-1623)
| | +---William Mock (ABT 1641-MAY 1719)
| | | | +---William Cock
| | | +---Julian Cock (ABT 1610-)
| +---Julian Mock (ABT 1663-)
| +---Dorcas ? (-AUG 1707)
Edward Arthur
| +---James Trethewy (ABT 1517-ABT 1573)
| +---Richard Trethewy (BEF 1550-)
| +---Anthony Trethewy (-JUN 1625)
| | | +---William Hawkins
| | +---Joan Hawkins (ABT 1530-)
| +---Lewis Trethewy (AFT 1619-ABT 1693)
| | +---Elizabeth ? (-ABT 1644)
| +---John Trethewy
| | +---Elizabeth Arundell
| +---Robert Trethewy (ABT 1698-AUG 1771)
| | +---Elizabeth ? (-JAN 1708)
| +---Henry Trethewy (ABT 1734-APR 1784)
| | +---Grace Rogers (-SEP 1772)
+---Grace Trethewy (01 JAN 1767-)
+---Charity Richards