In Croatia, Šuljuk families are Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek.
Only a few people with faimily name Šuljuk live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Osijek (<5).