I too am researching Bellmans from Hanover. My gt. gt grandfather was William Bellman b.1830. He had a brother George. They came over to England to work in the sugar industry. They lived in London where William met his wife Catherine, then they moved to Liverpool where my grandfather (also William)was born. There are several children Frederick, Fritz, John, Mata, Bertie born o William and Catherine. I am unsure whether Frederick or John is my gt grandfather as they both had boys called William!!
Happy hunting
Debbie Harper