Cognomen יאפ (Jaap 
, יאפ 
) , in the world, is quite a rare surname. The family name יאפ is habitual in Netherlands, where it is a rare surname, Germany, and New Zealand. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Netherlands. More frequently, יאפ is the forename as well as the last name.