There is one place named Dennis Island in Australia.
All places in the world called "Dennis Island".
Gladstone (5)
Hamilton (5)
Kingston (5)
Gordon (4)
Windsor (4)
Newstead (4)
Cremorne (4)
Springfield (4)
Woodstock (4)
Darlington (4)
Rosedale (4)
Richmond (4)
Waterloo (3)
Bangor (3)
Rosebery (3)
Spring Hill (3)
Brighton (3)
Buxton (3)
Clare (3)
Mosquito Creek (3)
Stratford (3)
Bald Hills (3)
Homebush (3)
Inglewood (3)
Stonehenge (3)
Windermere (3)
Alberton (3)
Broughton (3)
Donnybrook (3)
Greenmount (3)