+---John Powell
| | +---Nicholas Cowlin (ABT 1843-)
| | +---John Cowlin (19 FEB 1872-14 NOV 1930)
| | | +---Elizabeth ? 
(ABT 1846-)
| | +---Frederick John Cowlin (30 JUL 1903-17 DEC 1974)
| | | | +---John Ridge (ABT 1843-)
| | | +---Ada Alicia Ridge (ABT 1871-)
| | | +---Mary Jane Bicknell (ABT 1848-)
| +---Joyce Cowlin
| | +---Henry Christian Volmar
| +---May Anneley Volmar (11 APR 1900-10 AUG 1934)
Gareth Powell
+---Lorraine Bradley