(-JUL 1676)
+---Thomas Trethewey
+---Joseph Trethewey (ABT 1697-)
| | +---Henry Hawkins (-BEF 1675)
| +---Pasques Hawkins 
(-OCT 1724)
Thamosin Trethewey (ABT 1747-)
+---Wendon Julyan
(-JUL 1676)
+---Thomas Trethewey
+---Joseph Trethewey (ABT 1697-)
| | +---Henry Hawkins (-BEF 1675)
| +---Pasques Hawkins (-OCT 1724)
Thamosin Trethewey (ABT 1747-)
+---Wendon Julyan