Hi Sylvia and Wayne , had a look at the census indexes IOM , and he appears on the 1851 age 11 months in Rushen with father John 48, mother Charlotte 38, Eleanor 15, Thomas 13, John 8, William 6, James 4 and Joseph 2.
Then they all disappear, not on 1861/71 census index IOM , can't find any of them on 1880 US , 1881 all of England, 1881 Canada , and can't find them coming to New South Wales/Victoria/Queensland..

Searched Nora Ramus's "Emigration List to Australia" and appears that James John Jnr and Robert are there , but I still cant find them arriving

So I think we can eliminate this one

Cheers
David