In Croatia, Janjac families are almost entirely Croats (from Ozalj area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj area and in Karlovac.
Prevalence
About 40 people with faimily name Janjac live in Croatia today, in 16 households. There were 50 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 6 cities and 5 other places, mostly in Restovo in Ozalj area (<10), Vodice (<10), Velika Mlaka (<10), Karlovac (<10), and in Kamanje in Ozalj area (<5).
Outside Croatia
Family name Janjac is present in 7 countries on two continents. "Yanyac " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1925 in source Emigration Commission Zagreb.