(1906-1983)
+---Mark Gregson Cogswell (1933-)
| | +---William Henry Warne (1874-1961)
| +---Jessie Annie Marie Warne 
(1907-1990)
| | +---George How (1768-1850)
| | +---George How (1805-1887)
| | | +---Elizabeth Rebdell (1767-1841)
| | +---Samuel How (ABT 1831-1922)
| | | | +---Samuel Esterbrook
| | | +---Dianne Esterbrook (1803-1894)
| | | +---Ann ?
| +---Jessie Emily How (1869-1961)
| +---Mary Ann Grigson (1832-1917)
Sallyanne Cogswell (1969-)
+---Jacqueline Bagshaw (1943-)