In Croatia, Šiljan families are Croats (from Pula ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin and Pula.
Prevalence
About 10 people with faimily name Šiljan live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are only located in in one Croatian city and another small place , mostly in Pula (<10) and Krsan in Labin area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.