Last name Яфет (Japhet 
, Yaphet 
, Яфет 
) , in all the world, is a common surname. The cognomen Яфет is characteristic of Tanzania, where it is quite a common surname, Israel, and Namibia. In absolute terms, it is the most numerous in Tanzania, Nigeria, and Israel. More frequently, Яфет is the forename as well as the last name.