Hrnjkaš families are Croats and they are mostly from middle Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Odzak area) and in Middle Bosnia (Kupres area). In Goravci in Middle Bosnia every sixth inhabitant had the family name Hrnjkaš.
Prevalence
About 80 people with faimily name Hrnjkaš live in Croatia today, in 30 households. They are located in 8 Croatian counties, in 12 cities and 8 other places, mostly in Zagreb (30), Piskorevci (<10), Bukovlje in Slavonski Brod area (<10), Velika Gorica (<10), and in Tomasica (<10).
Outside Croatia
Family name Hrnjkaš is present in this form only in Croatia.
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.