In Croatia, Tkaučić families are Croats (from Pregrada ). In the past century, relatively most of Croatian residents bearing this family name were born in Pregrada and in Slovenia.
Prevalence
Only a few people with faimily name Tkaučić live in Croatia today, in one household only. They are located in only two Croatian places: in Kostel (<10) and Zutnica (<5).
Outside Croatia
Family name Tkaučić is present in this form only in Croatia.