Jerkan families are Croats and they are mostly from Sinj area. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and in Sinj area.
Prevalence
About 150 people with faimily name Jerkan live in Croatia today, in 70 households. There were 90 of them in the middle of the past century, and their number increased by 70 percent. They are located in threee Croatian counties, in 7 cities and 5 other places, mostly in Hrvace in Sinj area (90), Split (35), Sinj (15), Zagreb (15), and in Kastel Gomilica (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.