In Croatia, Trdy families are predominantly Croats (from Pozega area ), rarely Czechs (also from Pozega area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pozega area and in Osijek.
Prevalence
About 10 people with faimily name Trdy live in Croatia today, in five households only. They are located in threee Croatian counties, two cities and another small place , mostly in Kaptol in Pozega area (<10), Osijek (<5), and in Zagreb (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.