In Croatia, Udatny families are Croats (from Zagreb ). 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 Udatny 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 located in one Croatian city only, in Zagreb (<10).
Outside Croatia
Family name Udatny is present in this form only in Croatia.