Sekelez families are Croats and they are mostly from Imotski area. According to some sources they are from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Imotski area and in Split.
Prevalence
About 70 people with faimily name Sekelez live in Croatia today, in 20 households. There were 50 of them in the middle of the past century, and their number increased by 30 percent. They are located in 7 Croatian counties, in 6 cities and 5 other places, mostly in Split (25), Opanci in Imotski area (10), Zagreb (10), Vukovar (<10), and in Osijek (<5).
Outside Croatia
Family name Sekelez is present in three countries.
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.