In Croatia, Regula families are Croats (from Samobor area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Klanjec.
Prevalence
About 10 people with faimily name Regula live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in only threee naselja i to in Zagreb (<10), Strmec in Samobor area (<5), and in Sesvete (<5).
Outside Croatia
Family name Regula (including: Regulla , Reguela ) is present in 27 countries worldwide. The family name "Regula " is used by some 1000 people in Poland , about 1000 in the United States , and some 300 people in Switzerland.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.