Family name Bât (Bat 
, Batman 
, Bât 
) , in all the world, is a common last name. The family name Bât is habitual in Mongolia, where it is a common surname, Israel, where it is quite a common surname, and Martinique. Measured by absolute frequency, the name is most common in Israel, Turkey, and Mongolia. Likewise, Bât is the forename as well as the last name.