In Croatia, Culag families are Croats (from Virovitica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Virovitica area.
Prevalence
About 10 people with faimily name Culag live in Croatia today, in three households only. They are located in only two naselja i to in Sesvete (<10) and Terezino Polje in Virovitica area (<10).
Outside Croatia
Family name Culag is present in 6 countries on three continents. "Cullagh " is used by small number of people in the United States and small number in Ireland.