Cognomen Obaja (Obaja 
, Овдій 
, Авдий 
) , worldwide, is quite a rare surname. The surname Obaja is habitual in Ukraine, where it is quite a rare surname, Indonesia, where it is a rare surname, and Morocco. In absolute terms, it most frequently occurs in Ukraine, Indonesia, and Nigeria. Likewise, Obaja is the forename as well as the last name.