Last name Тестю (Voyet 
, Testud 
, Тестю 
) , across the world, is quite a rare surname. The surname Тестю is habitual in France, where it is quite a rare surname, Switzerland, where it is a very rare surname, and Russia, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in France, China, and Switzerland. Much less frequently, Тестю is the forename as well as the last name.