Surname Pekus (Pekus 
, Пекус 
) , all over the world, is a rare last name. The surname Pekus is habitual in Belgium, where it is a rare surname, Estonia, and Belarus, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Russia, Belgium, and Ukraine. Much less frequently, Pekus is the forename as well as the last name.