+---Leonard Theodore Jacobsen (09 OCT 1892-20 JUL 1974)
| +---Inga Catherine Nielsen 
+---David Eric Jacobsen (17 APR 1922-)
| | +---William Smith (-1861)
| | +---Thomas Smith (ABT 1803-07 JAN 1889)
| | | +---Elizabeth Harris
| | +---John Thomas Smith (09 JAN 1841-18 NOV 1902)
| | | +---Lucy Clarke (ABT 1806-1873)
| | +---John Smith (02 OCT 1867-23 AUG 1947)
| | | | +---John Bizley
| | | | +---Isaac Bizley (DEC 1819-)
| | | +---Emma (Emily) Bizley (10 APR 1846-07 APR 1925)
| | | | +---James Tucker
| | | +---Mary Ann Tucker (07 OCT 1818-)
| +---Lilian Gertrude Smith (05 NOV 1892-10 OCT 1965)
| | +---Albert Hodges
| +---Lillian Annie Hodges (30 AUG 1868-14 AUG 1965)
| +---Elizabeth Mary Carver
Maxwell John Jacobsen
+---Janet Montgomery (1922-)