In Croatia, Šlajner families are Croats (from Buje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pazin.
Prevalence
Only a few people with faimily name Šlajner live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Radini in Buje area (<5), Fazana (<5), Rasa in Labin area (<5), and in Zamask (<5).