Lukac families are Croats and they are mostly from Gospic. In the past century, relatively most of Croatian residents bearing this family name were born in Gospic and Vinkovci.
Prevalence
About 90 people with faimily name Lukac live in Croatia today, in 50 households. There were 80 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 14 cities and 16 other places, mostly in Vinkovci (10), Zagreb (10), Velika Gorica (<10), Osijek (<10), and in Slatina (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over forty times, the first time 1683 in source Catholic Church Parish Records.