Family name Banghai (邦海 
, 帮海 , Banghai 
) , all around the world, is a rare cognomen. The last name Banghai is habitual in China, where it is a very rare surname, Chile, where it is an extremely rare surname, and Spain. In absolute terms, it most frequently occurs in China, Nigeria, and Spain. More prevalently, Banghai is the forename as well as the last name.