+---John William Gray (ABT NOV 1887-30 APR 1940)
Merton Roland Gray (ABT 1920-15 NOV 1969)
| +---William Pearce (ABT 1829-)
| +---William Henry Pearce (11 MAY 1861-06 DEC 1936)
| | +---Charlotte Coker 
(ABT 1833-)
+---Charlotte Elizabeth Pearce (06 FEB 1885-23 FEB 1972)
| +---Edwin Bickerstaff Wesson (ABT 1791-12 APR 1827)
| +---Edwin Henry Bickerstaff Wesson (26 SEP 1820-18 MAR 1908)
| | +---Mary Ann Pengilly
+---Clara Wesson (18 APR 1862-06 JUN 1941)
| +---William Polkinghorne (ABT 1801-)
+---Elizabeth Jane Polkinghorne (ABT 1827-09 JUL 1890)
+---Elizabeth Ould (ABT 1806-)