In Croatia, Sieber families are Croats (from Varazdin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Varazdin.
Prevalence
About 20 people with faimily name Sieber live in Croatia today, in 7 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only five naselja i to in Zagreb (10), Varazdin (<5), Split (<5), and in Varazdin Breg (<5) and Turcin (<5) in Varazdin area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.