I don't know about the relationship of people with this name.
Krajkovici appears to have had about 7 houses in 1910, as per the Austrian Military map, which you can find below. No church is indicated in Krajkovici, but there are churches indicated at nearby Djedici, Prosjek and Hum.http://lazarus.elte.hu/hun/digkonyv/topo/200e/36-43.jpg
The LDS does not have many Orthodox Church films from that region. Perhaps you can find some info by posting to the Serbia based group belowhttp://www.rodoslovlje.com/en/forum