In Croatia, Thoss families are Croats (from Porec ).
Prevalence
Only a few people with faimily name Thoss live in Croatia today, in two households only. They are located in one Croatian city only, in Porec (<5).
Outside Croatia
Family name Thoss is present in 18 countries worldwide. The family name "Thoss " is used by some 1000 people in Germany , about 200 in the United States , and some 100 people in Argentina.