Jayne Elizabeth Lesley Walker 
| +---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-)
+---Barbara Doreen Cowlin
| +---Henry Christian Volmar
+---May Anneley Volmar (11 APR 1900-10 AUG 1934)