Šiljeg families are Croats and they are mostly from Metkovic. In the past century, relatively most of Croatian residents bearing this family name were born in Metkovic and in Herzegovina (Ljubuski area). In Nova Sela in Opuzen area every fifth inhabitant had the family name Šiljeg.
Prevalence
About 450 people with faimily name Šiljeg live in Croatia today, in 170 households. There were 210 of them in the middle of the past century, and their number doubled. They are located in the most of Croatian counties, in 23 cities and 31 other places, mostly in Metkovic (225), Zagreb (65), Opuzen (25), Ploce (15), and in Vid (15).
Outside Croatia
Family name Šiljeg is present in 10 countries on three continents. The family name "Siljeg " is used by small number of people in Australia and small number in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.