In Croatia, Vierda families are Croats (from Dubrovnik ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and Zagreb.
Prevalence
About 20 people with faimily name Vierda live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Dubrovnik (15) and Zagreb (<5).
Outside Croatia
Family name Vierda is present in 16 countries worldwide. "Wierda " is used by some 1000 people in the Netherlands , about 400 in the United States , and some 100 people in Congo.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.