In Croatia, Lončić families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
About 10 people with faimily name Lončić live in Croatia today, in three households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are located in only two naselja i to in Demerje (10) and Zagreb (<5).
Outside Croatia
Family name Lončić (including: Loncic , Loncich ) is present in four countries on two continents. "Loncich " 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.