Surname Геру (Gueroult 
, Геру 
) , in the entire world, is quite a rare family name. The family name Геру is characteristic of France, where it is quite a rare surname, Spain, where it is a very rare surname, and Canada. Measured by absolute frequency, the name is most common in France, Spain, and the United Kingdom. Very seldom, Геру is the forename as well as the last name.