Last name Olg (Olg 
, Ольг 
) , all around the world, is a rare cognomen. The surname Olg is habitual in Taiwan, where it is a rare surname, Morocco, where it is a very rare surname, and Kyrgyzstan. In absolute terms, the name is most common in Taiwan, Morocco, and France. Also, Olg is the forename as well as the last name.