Surname Йенч (Jentsch 
, Jentzsch 
, Йенч 
) , in the world, is a common family name. The last name Йенч is characteristic of Germany, where it is quite a common surname, Austria, where it is quite a rare surname, and Serbia. In absolute terms, the name is most common in Germany, the United States, and Austria. Very seldom, Йенч is the forename as well as the last name.