Prelas families are Croats and they are mostly from Omis , or Omis area. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Sinj.
Prevalence
About 80 people with faimily name Prelas live in Croatia today, in 40 households. There were 60 of them in the middle of the past century, and their number increased by 30 percent. They are located in 8 Croatian counties, in 11 cities and 6 other places, mostly in Split (25), Glavice (20), Brnaze (10), Omis (10), and in Trilj in Sinj area (<10).
Outside Croatia
Family name Prelas is present in 6 countries on three continents. The family name "Prelas " is used by small number of people in the United States. "Perelas " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.