In re to SUZNOVICH the closest records found at Ellis Island are:
6. Nikola Suznjevich Raguse, Herzegov 1920 29
7. Petar Suznjevic Graberje, Croatia 1911 43
Nikola (neekola means Nicholas) was going to ILL and Petar was going to Yonkers, NY. The surname is pronounced soozyanvich in both cases. The C at the end of Petars name has a diacritcal mark giving it the CH sound. It was typical for immigrants at the turn of the century to add an H in the US to keep the CH sound. In the case of Nikola he is coming from Ragusa, now Dubrovnik Croatia. In that region Venice and Italy had ruled for some time and influenced the sp. of the names in Italian as in Eng the CH was used.
In re to RACSANDICH no listings are found at Ellis Island. However there are 50 listings for ROKSANDIC and RAKSANDIC. It should be noted that the C in the case of your sp. may have been changed. The C in Croatian w/o a diacritical mark will sound like the ts in the word cats, and will never sound like a hard K. Of the 50 listings at Ellis Island most declared themselves to be Croatian, however by the given name many of those may have been Orthodox which by today's reckoning are called Serbs, and some declared themselves to be Servian (an old Eng term for Serbian.
Yugosalvia did not come into being until 1929 and was basically disolved in 1991. Also of interest few Serbs came from Serbia proper prior to the 1920s, with most coming from Croatia and the old Hungarain Banat, which is now northern Serbia.
I hope this will help. Please feel free to email me direct if you have any questions.http://www.croatia-in-english.com/rj/index.html
Croatian Heritage Museum