Surname Нигра (Nigra 
, Нигра) , in the world, is quite a rare cognomen. The surname Нигра is habitual in Portugal, where it is quite a rare surname, Luxembourg, and Morocco, where it is a rare surname. Measured by absolute frequency, the name is most common in Argentina, Italy, and Morocco. Much less frequently, Нигра is the forename as well as the last name.