Son/daughter of a Bishop in Croatia? Perhaps...
POPOVIC son of a Priest in Croatia? Perhaps-
"The Church was a thousand years old before it definitively took a stand in favor of celibacy in the twelfth century at the Second Lateran Council held in 1139, when a rule was approved forbidding priests to marry. In 1563, the Council of Trent reaffirmed the tradition of celibacy."
Christianity was definately accepted by Croatians prior to the Council of Trent.