Tandara families are Croats and they are mostly from Imotski area. According to some sources they are from Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Imotski area and in Herzegovina (Posusje area). In Zavelim in Herzegovina every tenth inhabitant had the family name Tandara.
Prevalence
About 300 people with faimily name Tandara live in Croatia today, in 100 households. There were 110 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 22 cities and 15 other places, mostly in Zagreb (75), Split (45), Bjelovar (25), Djakovo (25), and in Ricice in Imotski area (20).
Outside Croatia
Family name Tandara is present in 17 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.