You are so lucky :)
Surname POPAŽIVANOV is so colorful and rare you need not search further than anyone still carrying in to find relatives and descendants of the same family . :)
Your ancestors POPAŽIVANOV were ethnic Serbs and of Eastern Orthodox(Serbian Orthodox) religion.
Their place of origin is KIKINDA town, in the province of Vojvodina, in Serbia.
Your relatives still live in that town. http://www.google.hu/#hl=hu&sclient=psy-ab&q=Popa%C5...
Etymology of the surname -:
POP in Serbian language means priest.
POPA is a local dialect variant of that word used in Vojvodina.
ŽIVAN is a given name.
POPAŽIVANOV - (son of) Živan the priest.
Serbian Genealogy Society SGS "Rodoslovlje"http://www.rodoslovlje.com/en