sorry, I haven't looked in here for years.
You don't have right information. Real name of the village Itebej is Srpski Itebej (Serbian Itebej) and it is very old village (older then 790 years). Locals usually call it just Itebej. Novi Itebej is smaller and younger willage, and is located near to the Srpski Itebej. There are live predominantly Hungarian people. This is the reason why there are no last name Petak.
In Zrenjanin live just my mother and Zdravko (he is my distant relative, but I don't know him). The other two from your list do not share my last name.
Yes, Petak is Fridey in english. Also, Friday could mean and coins in denominations of five.
If you want to know something about us or anything else, please say.