In Croatia, Spleit families are Croats (from Samobor ). In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and Zagreb.
Prevalence
Only a few people with faimily name Spleit live in Croatia today, in two households only. They are located in two Croatian cities only, in Samobor (<10) and Zagreb (<5).
Outside Croatia
Family name Spleit is present in five countries on two continents. The family name "Spleit " is used by small number of people in Austria , small number in Canada , and small number of people in the United States. "Spleith " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.