In Croatia, Carlovich families are Croats (from Rijeka ).
Prevalence
About 20 people with faimily name Carlovich live in Croatia today, in one household only. There were 30 of them in the middle of the past century, and their number decreased by 30 percent. They are located in one Croatian city only, in Rijeka (<5).
Outside Croatia
Family name Carlovich is present in 8 countries on three continents. The family name "Carlovich " is used by some 100 people in Brazil , about 90 in Argentina , and small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.