In Croatia, Mercelj families are Croats (from Varazdin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin.
Prevalence
Only a few people with faimily name Mercelj live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in only one small Croatian place, in Trnovec in Varazdin area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.