Ragusa, is now nowadays called Dubrovnik. There is actually a lot of info on it, but I doubt in English though. It has always been a independent state, it started to be part of Yugoslavia and later Croatia after the independent wars. Most inhabitants of Ragusa were Venetians and nobles from the region. They were independent for a long period and the Ottomans never conquered the city.

Working on some nice maps to show you guys soon

Thank you Sergej, On my grandfathers manifest when he came back in 1920.It stated his residency was Ragusa/ Herc. Thanks for he correction

Sheila