Thanks for the information. This is a long shot at best, so every lead might be the "magic" one. My only info is that my ancestor came to the US "about 1850" and his children state on census records that he came from Dalmatia. I have no parental names or anything to work from and he would have only been about 10 at the time of his arrival. It's like looking for a needle in a haystack, for sure.
I'll investigate this line of info and see where it leads.