Jerkov families are Croats and they are mostly from Sibenik. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Split.
Prevalence
About 70 people with faimily name Jerkov live in Croatia today, in 40 households. There were 70 of them in the middle of the past century, and their number remains constant. They are located in 9 Croatian counties, in 12 cities and 5 other places, mostly in Sibenik (20), Split (15), Tribunj (15), Rijeka (10), and in Zirje (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.