Surname Яп (Jaap 
, Jap 
, Яп 
) , around the world, is a common cognomen. The cognomen Яп is habitual in Suriname, where it is quite a common surname, Indonesia, where it is quite a rare surname, and Malaysia. Not in comparison with a country's population, this name is the most popular in Indonesia, India, and Malaysia. Likewise, Яп is the forename as well as the last name.