Longin families are Croats and they are mostly from the Island of Ugljan. In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and on the Island of Ugljan.
Prevalence
About 250 people with faimily name Longin live in Croatia today, in 120 households. There were 250 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 9 cities and 7 other places, mostly in Zadar (140), Kali on the Island of Ugljan (70), Rijeka (15), Zagreb (10), and in Split (<10).
Outside Croatia
Family name Longin is present in 41 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.