Family name אמדאו (Amadeo 
, Amedeo 
, אמדאו 
) , all around the world, is a common last name. The last name אמדאו is habitual in Spain, where it is quite a common surname, Mexico, where it is quite a rare surname, and Honduras. Measured by absolute frequency, it is commonest in Mexico, Spain, and Argentina. More prevalently, אמדאו is the forename as well as the last name.