Jelaska families are Croats and they are mostly from Split. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Zagreb.
Prevalence
About 240 people with faimily name Jelaska live in Croatia today, in 120 households. There were 210 of them in the middle of the past century, and their number increased by 20 percent. They are located in 9 Croatian counties, in 13 cities and 15 other places, mostly in Split (195), Zagreb (30), Dubrovnik (<10), Sisak (<10), and in Zadar (<5).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States. Family name Jelaska is present in 10 countries on three continents. The family name "Jelaska " is used by small number of people in the United States. "Yelaska " is used by small number of people in the United States and small number in Australia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.