Cognomen Sydoryk (Sydoryk 
, Сидорик 
, Сыдорык ) , in the world, is quite a rare last name. The cognomen Sydoryk is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Kazakhstan. In absolute terms, it is the most numerous in Eastern Europe, particularly Belarus, Ukraine, and Russia. Very seldom, Sydoryk is the forename as well as the last name.