Cognomen Sonk (Sonk 
, Сонк 
) , around the globe, is a rare last name. The last name Sonk is characteristic of Papua New Guinea, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Egypt, where it is a very rare surname. In absolute terms, the name is most common in Papua New Guinea, Indonesia, and Egypt. Much less frequently, Sonk is the forename as well as the last name.