Family name Tetchy (Tache 
, Tatch 
, Tetchy 
) , in the world, is a common last name. The last name Tetchy is characteristic of Romania, where it is quite a common surname, Cameroon, where it is quite a rare surname, and Switzerland. In absolute terms, the name is most common in Romania, Cameroon, and France. Much less frequently, Tetchy is the forename as well as the last name.