In Croatia, Jandrek families are almost entirely Croats (from Sinj ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and in Sinj area.
Prevalence
About 30 people with faimily name Jandrek live in Croatia today, in 11 households. There were 40 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, four cities and threee other places, mostly in Obrovac Sinjski (15), Split (10), Zagreb (<10), Sinj (<5), and in Podstrana in Solin area (<5).
Outside Croatia
Family name Jandrek is present in this form only in Croatia.