(-JUL 1676)
+---Lewis Trethewey (AFT 1668-)
| +---Joan James 
+---Lewis Trethewey (-ABT 1753)
| +---Florence Nichols (-BEF 1706)
+---John Trethewey (ABT 1745-SEP 1820)
| +---Jane Wilcock
Elizabeth Trethewey (ABT 1775-BEF 1782)
+---Elizabeth Kendall