In Croatia, Merlle families are Croats (from Biograd na moru ). In the past century, relatively most of Croatian residents bearing this family name were born in Biograd na moru and Zadar.
Prevalence
Only a few people with faimily name Merlle live in Croatia today, in two households only. They are located in three Croatian cities only: in Molat (<5), Biograd na moru (<5), and in Benkovac (<5).
Outside Croatia
Family name Merlle is present in three countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1924 in source Emigration Commission Zagreb.