I spoke to my dad who knows the family history quite well. Zaraks settled in a village called Cvaljina (sounds like chvalyina) over a thousand years ago. There is a graveyard near there with loads of Zaraks on the tombstones, its really strange to see! I went over to Croatia a few years ago and saw it and stayed in Slano ( I don't think there are any zaraks left in slano though?) When the Ottomans invaded and occupied the region they dispersed to the following villages in the surrounding mountains of the cvaljina region: Liku Gajic Slano ( is on the coast) The family from Slano moved to a town called osojnik (sounds like OSHUYNIK) and it is here that most of the Slano Zaraks are now living, chances are these are your closest relatives. That whole area from Slano to Dubrovnik is absolutely breathtaking so you should go there if you havent. There is a story dad mentioned that a zarak from Slano went to central/south america, possibly Panama? in the 19th century and again another one in the 20th century, so i dont know if this is your family history.
There is a monastery in Slano and in Dubrovnik, or the village priest will have records of all births (baptisms) in Osojnik and Slano. The old church in Slano has nearly fallen over, so you may need to find out where the records went if you already haven't as I see that you enquired about 2 years ago. Hope this helps. Pazi se (look after yourself) and if you have found family info, I would love to hear it.