HI, I never did find much on Rosario, I don't think his parent came over, well at least not on the same boat he did.
I found his children, he had a daughter named Anna, she is now in her 80s, and a son told my father in law that he remembers Rosario going to FL. to work and that is the last they saw of him, all the children were in foster homes except for my father in law who was adopted.
I suppose there could be a connection? I haven't looked at the info in a long time. I do have a photo of him. If you would like to to try and connect or a copy of the photo you can emaail me at zackbree@yahoo.com