Štirjan families are Croats and they are mostly from Zapresic area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zapresic area. In Mokreš in Pleternica area every seventh inhabitant had the family name Štirjan.
Prevalence
About 70 people with faimily name Štirjan live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 30 percent. They are located in four Croatian counties, two cities and 6 other places, mostly in Zagreb (40), Jakovlje in Zapresic area (15), Novoselec in Ivanic-Grad area (10), Josipovac (<10), and in Sesvete (<5).
Outside Croatia
Family name Štirjan (including: Shatiryan , Stirjan ) is present in 6 countries on three continents.
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.