Bennett of Nottingham

My 5 x great grandfather was Samuel Benjamin Bellamy Bennett.
According to his death certificate he was born in Nottingham, but I am not sure about this.
He married my 5 x great grandmother in Richmond Victoria Australia
in 1854.
They had 3 children before their marriage, 2 living John and William.
All children were born in Richmond Victoria Australia.
My 5 x great grandmother was Elizabeth Taylor a convict transported to Van Diemens Land in 1829.
She married a William (Jeremiah)Smith before her marriage to Samuel.
They lived in Boundary Bend, the Victorian side of the Murray River near Swan Hill.
I would like to find any Bennett's who may be connected to Samuel as I know nothing about him apart from his marriage and after.
According to his death certificate he lived in both South Australia and New South Wales before his marriage.