Joel - I don't know anything about your great-grandfather Alessandro Dello Strogolo but the names Polack and Nacamuli set off quite a few bells with me. They married into families I have been researching by the names of BIMSENSTEIN/DECASTRO/ VIVANTE. The DECASTRO family also originated in Livorno. I suspect we must be dealing with the same extended family. Please tell me more. I can be reached at
info@researchroots.co.uk.