In Croatia, Granz families are Croats (from Koprivnica ).
Prevalence
Only a few people with faimily name Granz live in Croatia today, in one household only. They are located in one Croatian city only, in Koprivnica (<5).
Outside Croatia
Family name Granz is present in 21 countries worldwide. The family name "Granz " is used by some 1000 people in Germany , about 100 in the United States , and some 90 people in Cameroon.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.