In Croatia, Mann families are Croats (from Dubrovnik ).
Prevalence
About 20 people with faimily name Mann live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are only located in threee Croatian cities and two other places, mostly in Dubrovnik (<5), Zagreb (<5), Osijek (<5), Tribunj (<5), and in Mrkopalj in Delnice area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.