1. Have you checked EVERY census to see if (hopefully) they give something more specific for birthplace? If not, it may be worth posting a Lookup Request in the appropriate geographic board ?
Yes I have all the census records.
2. Have you checked naturalisation records (if indeed they were naturalised) ? They can be very detailed and interesting.
Yes, they were not naturalized, at least I couldnt find anything
3. Are there any siblings on the census that may provide further info?
He had no brothers or sisters that I know of (in the UK)
4. The Immigrant Resources board has a lot of pointers and has some special links which relate to Jewish immigrants I believe.
I will look there again, thanks
5. The musical connection is difficult as they may have been 'street' musicians (there were loads which immigrated from Italy, Germany etc) or more 'professional' musicians. Hard to tell without knowing more about their census entries ...
The entries just say 'musician' (this is on a marriage cert not a census) None of the census records mention musician atall, he just has various jobs like skin dresser, tailor, clothes salesman etc