Family name バイイ (Bally 
, バイイ) , worldwide, is quite a common surname. The last name バイイ is habitual in Trinidad and Tobago, where it is quite a common surname, Switzerland, and France, where it is quite a rare surname. In absolute terms, this name is the most popular in France, Switzerland, and the United States. Likewise, バイイ is the forename as well as the last name.