Family name 毕奥 (Biot 
, 毕奥) , in all the world, is quite a rare last name. The cognomen 毕奥 is habitual in Western Europe, particularly Belgium, where it is quite a rare surname, France, and Luxembourg. Not in comparison with a country's population, it is commonest in France, Belgium, and Spain. Very seldom, 毕奥 is the forename as well as the last name.