In Croatia, Klai families are Croats by relative majority (from Labin ), equally Italians (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin and Rijeka.
Prevalence
Only a few people with faimily name Klai live in Croatia today, in two households only. They are located in two Croatian cities only, in Rijeka (<10) and Petrovija (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1924 in source Emigration Commission Zagreb.