Surname Pichak (พิจักษณ์ 
, Pichak 
, Пишак 
) , in the world, is a rare cognomen. The family name Pichak is characteristic of Argentina, where it is a rare surname, Ukraine, and Kazakhstan, where it is a very rare surname. In absolute terms, it is the most numerous in Russia, Argentina, and Ukraine. More frequently, Pichak is the forename as well as the last name.