Drnasin families are Croats and they are mostly from Trogir area. In the past century, relatively most of Croatian residents bearing this family name were born in Split and in Trogir area. In Prgomet in Trogir area every fourth inhabitant had the family name Drnasin.
Prevalence
About 200 people with faimily name Drnasin live in Croatia today, in 90 households. There were 90 of them in the middle of the past century, and their number doubled. They are located in 9 Croatian counties, in 13 cities and 15 other places, mostly in Split (60), Kastel Stari (20), Prgomet in Trogir area (20), Otok in Vinkovci area (15), and in Zagreb (15).
Outside Croatia
Family name Drnasin is present in four countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.