In Croatia, Helešy families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Petrinja and Sisak.
Prevalence
Only a few people with faimily name Helešy live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in two Croatian cities only, in Sisak (<5) and Zagreb (<5).
Outside Croatia
Family name Helešy (including: Hellessey , Thelessy and Helesy ) is present in three countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.