In Croatia, Mender families are Croats (from Opatija ). In the past century, relatively most of Croatian residents bearing this family name were born in Opatija and Rijeka.
Prevalence
About 10 people with faimily name Mender 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 located in only threee Croatian places: in Icici (<5), Poljane (<5), and in Veprinac (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Mender is present in 28 countries worldwide. The family name "Mender " is used by some 400 people in the United States , about 100 in Turkey , and some 100 people in France.
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.