Last name Olija (Олия 
, Olija 
) , around the world, is a rare surname. The cognomen Olija is habitual in Kyrgyzstan, where it is quite a rare surname, Croatia, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Kyrgyzstan, Nigeria, and Croatia. More prevalently, Olija is the forename as well as the last name.