Cognomen אונדריי (Ondrej 
, אונדריי 
) , around the world, is quite a rare surname. The last name אונדריי is characteristic of Slovakia, where it is quite a common surname, Czechia, where it is quite a rare surname, and Bosnia and Herzegovina. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Slovakia, Czechia, and Hungary. More frequently, אונדריי is the forename as well as the last name.