In Croatia, Tvarušek families are Croats (from Novska ). In the past century, relatively most of Croatian residents bearing this family name were born in Novska and in Middle Bosnia (Zenica area).
Prevalence
About 20 people with faimily name Tvarušek live in Croatia today, in 6 households. They are located in threee Croatian counties, threee cities and threee other places, mostly in Stari Grabovac (10), Zagreb (<10), Mastrinka (<5), Rozdanik (<5), and in Trogir (<5).
Outside Croatia
Family name Tvarušek is present in this form only in Croatia.