Across the world, Blaj (Balázs 
, Blaj 
, Блай 
) is quite a rare principally masculine, but scarcely female forename. The forename Blaj is characteristic of Hungary, where it is quite a common masculine name, Romania, where it is quite a rare largely boy's, but infrequently female name, and Slovenia, where it is quite a rare boy's name. In absolute terms, it is the most numerous in Eastern Europe, particularly Hungary, Romania, and Slovakia. Also, Blaj is the last name as well as the forename.