Fak families are Croats and they are mostly from Delnice area. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 180 people with faimily name Fak live in Croatia today, in 70 households. There were 220 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 9 Croatian counties, in 16 cities and 23 other places, mostly in Rijeka (30), Mrkopalj in Delnice area (30), Zagreb (20), Stari Laz in Delnice area (10), and in Ivanic-Grad (<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.