In Croatia, Lanca families are generally Croats (from Porec ), rarely Italians (from Labin ). In the past century, relatively most of Croatian residents bearing this family name were born in Porec and Pula.
Prevalence
About 10 people with faimily name Lanca live in Croatia today, in three households only. There were 20 of them in the middle of the past century, and their number halved. They are only located in threee Croatian cities and threee other places, mostly in Pula (<5), Labin (<5), Porec (<5), Vinez (<5), and in Antonci (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.