In Croatia, Fleiss families are Croats (from Samobor ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Samobor.
Prevalence
About 10 people with faimily name Fleiss live in Croatia today, in 6 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in three Croatian cities only: in Zagreb (<10), Samobor (<10), and in Cres on the Island of Cres (<5).
Outside Croatia
Family name Fleiss is present in 20 countries worldwide. The family name "Fleiss " is used by some 200 people in the United States , about 100 in Germany , and some 100 people in Austria.