In Croatia, Krainz families are Croats (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Rijeka.
Prevalence
Only a few people with faimily name Krainz live in Croatia today, in five households only. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian cities only, in Zagreb (<5) and Rijeka (<5).
Outside Croatia
Family name Krainz is present in 18 countries worldwide. The family name "Krainz " is used by some 400 people in Germany , about 400 in Austria , and some 200 people in the United States.
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.