(-JUN 1720)
+---Thomas Trudgian (ABT 1697-1749)
| +---Ellinor Starke 
(-1726)
+---William Trudgian (ABT 1723-1799)
| | +---Samuel Hicks
| +---Jullian Hicks (ABT 1695-1765)
+---Thomas Trudgian (ABT 1765-MAR 1836)
| | +---Francis Bullan
| +---Ann Bullen (ABT 1720-JUL 1790)
William Trudgian (24 MAY 1800-DEC 1853)
| +---James Trethewy (ABT 1517-ABT 1573)
| +---Richard Trethewy (BEF 1550-)
| +---Robert Trethewy (BEF 1575-DEC 1623)
| | | +---William Hawkins
| | +---Joan Hawkins (ABT 1530-)
| +---Thomas Trethewy (ABT 1596-ABT 1664)
| | +---Ann Burgess (-ABT 1637)
| +---Robert Trethewy (AFT 1642-ABT 1690)
| | | +---William Jolley
| | +---Isabel Jolley (ABT 1606-)
| +---Charles Trethewy (AFT 1673-DEC 1735)
| | | +---John Scawen
| | | +---Trehane Scawen (ABT 1614-)
| | | | | +---John Trehane
| | | | +---Elizabeth Trehane
| | +---Dorothy Scawen (ABT 1653-)
| | | +---Gregory Arundell (-ABT 1653)
| | +---Dorothy Arundell
| | +---Edith Crane (-ABT 1666)
| +---John Trethewy (ABT 1700-)
| | +---Jane Williams (BEF 1683-)
| +---Charles Trethewy (ABT 1728-JUL 1813)
| | | +---William Perkin (-1688)
| | | +---John Parkin
| | | | +---Mary ?
| | +---Philadelphia Parkin (ABT 1694-MAY 1783)
+---Charlotte Trethewey (ABT 1771-SEP 1820)
+---Charlotte Gilbert