In Croatia, Rup families are Croats (from Varazdin ).
Prevalence
Only a few people with faimily name Rup live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in threee Croatian counties, two cities and another small place , mostly in Zagreb (<5), Varazdin (<5), and in Suhopolje in Virovitica area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.