Tvarog families are Croats and they are mostly from Lepoglava. In the past century, relatively most of Croatian residents bearing this family name were born in Lepoglava and Varazdin.
Prevalence
About 70 people with faimily name Tvarog live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 40 percent. They are located in the most of Croatian counties, in 11 cities and 6 other places, mostly in Lepoglava (35), Jerovec (<10), Zagreb (<10), Slakovci in Vinkovci area (<5), and in Pula (<5).