In Croatia, Šustra families are generally Croats (from Samobor area ), very rarely Czechs (from Daruvar area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Daruvar area.
Prevalence
About 20 people with faimily name Šustra live in Croatia today, in 10 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in only four naselja i to in Zagreb (<10), Garesnica (<5), and in Strmec (<5) and Gornji Stupnik (<5) in Samobor area.