LAZAR AMIDŽIĆ from SIVAC was, according to his ship manifest, going to his grandfather ŽIVKO AMIDŽIĆ.
If that is your ancestor, you should contact the Serbian Orthodox Church parish priest in Sivac for more information and help locating the relatives/ descendants of the same family.
The Serbian community in SIVAC is old and well documented, and records are available - the original church vital records have been handed over to the church recently, and the civil vital records are in the municipal office and in state historical archive in SOMBOR.
Besides vital records, church will have many other sources of information - cemetery and burial records, annual censuses of the families, as well as histories of the parish written by its priests.
In the handwritten history of the SIVAC parish, in year 1877. as member of the village council and dignitary was noted one SAVA AMIDŽIĆ.
Earliest Serbian Orthodox headstones in the cemetery were from year 1681., and church lists of *new* settler Serbian families in Sivac are from 1765.:
Влашкалић, Маџарев, Калуђерски, Грујин , Ћурић, Сувајџић, Рашковић, Буљевић, Мајски, Бајић, Белин, Верац, Верчев, Владисављев, Вргов, Вукоманов, Веселин, Томић, Главић, Давидов, Јеврин, Јокић, Кресојев, Латинкин, Папулић, Пушкарев, Томин, Чупић, http://www.sivac.net/srpska-crkva.htm
"Rodoslovlje" Serbian Genealogy Societyhttp://www.rodoslovlje.com/en