Jaška families are Croats and they are mostly from the Island of Rab. In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Rab and in Rijeka.
Prevalence
About 70 people with faimily name Jaška live in Croatia today, in 30 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in threee Croatian counties, in 7 cities and threee other places, mostly in Rijeka (20), in Supetarska Draga (20) and Rab (<10) on the Island of Rab, Karlovac (<10), and in Zagreb (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.