In Croatia, Rulj families are predominantly Croats (from Slatina ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Virovitica.
Prevalence
Only a few people with faimily name Rulj live in Croatia today, in four households only. There were 40 of them in the middle of the past century, and their number decreased significantly. They are located in threee Croatian counties, threee cities and another small place , mostly in Slatina (<10), Zagreb (<5), Vinkovci (<5), and in Negoslavci in Vukovar area (<5).