In Croatia, Kršulj families are almost entirely Croats (from Labin area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Pozega.
Prevalence
About 50 people with faimily name Kršulj live in Croatia today, in 18 households. There were 40 of them in the middle of the past century, and their number increased by 10 percent. They are located in four Croatian counties, in 7 cities and 8 other places, mostly in Sajini in Labin area (15), in Brestovac (10) and Nurkovac (<10) in Pozega area, Pozega (<5), and in Pula (<5).
Outside Croatia
Family name Kršulj is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.