In Croatia, Rek families are predominantly Croats (from Pakrac ), very rarely Italians (also from Pakrac ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Pakrac and Daruvar. In Gornja Obrijež in Pakrac every eighth inhabitant had the family name Rek.
Prevalence
About 70 people with faimily name Rek live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties, in 9 cities and 9 other places, mostly in Daruvar (25), Crikvenica (<10), Badljevina (<10), Veliki Banovac (<10), and in Gornja Obrijez (<10).
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.