In Croatia, Trdoslavić families are Croats (from Labin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin area and in Pula.
Prevalence
About 30 people with faimily name Trdoslavić live in Croatia today, in 11 households. There were 60 of them in the middle of the past century, and their number halved. They are located in threee Croatian counties and threee other places, mostly in Pula (<10), Rijeka (<5), Gologorica in Pazin area (<5), Veprinac (<5), and in Labin (<5).