In Croatia, Staub families are Croats (from Nin ).
Prevalence
About 10 people with faimily name Staub live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Zagreb (<5) and Nin (<5).
Outside Croatia
Family name Staub is present in 58 countries worldwide. The family name "Staub " is used by some 9000 people in the United States , about 4000 in Germany , and some 3000 people in Switzerland.