Cognomen Зайк (Zeik 
, Зайк) , all around the world, is a rare family name. The last name Зайк is habitual in Estonia, where it is a rare surname, New Zealand, where it is a very rare surname, and the United States. Measured by absolute frequency, the name is most common in the United States, China, and Germany. Much less frequently, Зайк is the forename as well as the last name.