In Croatia, Ahac families are Croats (from Grubisno Polje ). In the past century, relatively most of Croatian residents bearing this family name were born in Garesnica and Zagreb.
Prevalence
About 20 people with faimily name Ahac live in Croatia today, in 13 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities and another small place , mostly in Grubisno Polje (<10), Grbavac (<10), Zagreb (<5), Pula (<5), and in Rijeka (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.