Marčac families are Croats and they are mostly from Duga Resa area. In the past century, relatively most of Croatian residents bearing this family name were born in Duga Resa area and in Karlovac.
Prevalence
About 110 people with faimily name Marčac live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number increased by 10 percent. They are only located in in 8 Croatian cities and 19 other places, mostly in Duga Resa (15), in Barilovic (15), Leskovac Barilovicki (15) and Kriz Koranski (10) in Duga Resa area, and in Karlovac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1642 in source Catholic Church Parish Records.