Surname ニ (Ni 
, Ny 
, ニ 
) , throughout the world, is a prevalent last name. The family name ニ is habitual in Mongolia, where it is a widespread surname, Myanmar, where it is a common surname, and Indonesia (explore the name in all countries). Measured by absolute frequency, it is commonest in China, Indonesia, and Myanmar. Likewise, ニ is the forename as well as the last name.