In Croatia, Kiršig families are Croats (from Pleternica ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica.
Prevalence
Only a few people with faimily name Kiršig live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only one small Croatian place, in Zarilac (<10).
Outside Croatia
Family name Kiršig (including: Kirsig , Kirsching ) is present in two countries.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1927 in source Emigration Commission Zagreb.