Siroglavić families are Croats and they are mostly from Pleternica area. In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica area and in Slavonski Brod. In Lovčić in Pleternica area every fifth inhabitant had the family name Siroglavić.
Prevalence
About 70 people with faimily name Siroglavić live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 40 percent. They are only located in four Croatian cities and 9 other places, mostly in Brodski Stupnik (20) and Oriovac (15) in Pleternica area, Slavonski Brod (15), Zagreb (10), and in Lovcic in Pleternica area (<10).
Outside Croatia
Family name Siroglavić is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.