Their surname is Starcevic which is connected to Bunjevacs.
Some of the West Hercegovina Croat kits posted here before (vbnetkhio plotted them on the PCA) plotted near the Serb average.
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He is obviously Bunjevac by origin, and they can plot like Serbs but Croats from western Herzegovina on average don't.
I just find it strange to think they wouldn't mix with native Croats/Slovenians/Germans of Gorski kotar since their town was founded in 17th century.
Who knows, maybe they only inter-married with other Bunjevac settler families. Please find out his YDNA! :)
Ah, I see. Would be interesting, they may be related with Ante Starčević who was paternally also Bunjevac Croat :p
https://en.wikipedia.org/wiki/Ante_Star%C4%8Devi%C4%87
In Gorski kotar region southern-origin people are rare.
Could be.