In Croatia, Semeraj families are Croats (from the Island of Losinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Djurdjevac.
Prevalence
Only a few people with faimily name Semeraj live in Croatia today, in two households only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Djurdjevac (<5) and Mali Losinj on the Island of Losinj (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.