In Croatia, Tvrde families are Croats (from Omis ). In the past century, relatively most of Croatian residents bearing this family name were born in Split and Omis.
Prevalence
About 30 people with faimily name Tvrde live in Croatia today, in 13 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in threee Croatian counties, in 6 cities and another small place , mostly in Gata (10), Split (<10), Makarska (<10), Hreljin (<5), and in Zagreb (<5).
Outside Croatia
Family name Tvrde is present in this form only in Croatia.