+---John Chapman (05 APR 1800-28 DEC 1871)
| +---Grace Parson 
+---William Chapman (29 DEC 1825-10 JUN 1901)
| | +---John Pollamounter
| | +---Robert Pollamounter (ABT 1717-)
| | +---John Pollamounter (ABT 1757-23 JUN 1841)
| | | +---Catherine Cole
| +---Mary Ann Pollamounter (02 MAY 1803-23 FEB 1858)
| | +---James Trethewy (ABT 1517-ABT 1573)
| | +---Thomas Trethewy (-ABT 1616)
| | +---Bartholomew Trethewy
| | +---Bartholomew Trethewy (-1666)
| | +---Thomas Trethewey (-ABT 1692)
| | +---Bartholomew Trethewy (ABT 1667-MAY 1755)
| | +---Walter Trethewy (ABT 1702-NOV 1751)
| | | | +---Robert Trethewey (-JUL 1676)
| | | | +---Walter Trethewey (-1710)
| | | +---Elizabeth Trethewey (ABT 1670-AUG 1743)
| | | +---Mary Brewer
| | +---Bartholomew Trethewey (ABT 1735-)
| | | +---Joan Woon (-1735)
| +---Elizabeth Trethewy (ABT 1763-)
| +---Sarah Laskey
William Chapman (30 JUL 1852-24 APR 1921)
| +---Richard Coombe
+---Elizabeth Coombe (ABT 1826-03 MAR 1907)
+---Catherine Pomery