Tibljaš families are Croats and they are mostly from Rijeka. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 130 people with faimily name Tibljaš live in Croatia today, in 70 households. There were 180 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 6 Croatian counties, in 9 cities and 15 other places, mostly in Rijeka (70), Marinici in Rijeka area (20), Zagreb (<10), Opatija (<5), and in Osijek (<5).
Outside Croatia
At least three families with this surname emigrated from Croatia to the United States (2) and Germany (1). Family name Tibljaš (including: Tibljas , Tiblias and Tibllias ) is present in 7 countries on three continents. The family name "Tibljas " is used by some 70 people in the United States , small number in Saudi Arabia , and small number of people in Albania.
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.