In the world, Еффа (Effa 
, Еффа 
) is quite a rare unisex first name. The forename Еффа is characteristic of Brunei, where it is quite a rare feminine name, Ethiopia, where it is a rare female name, and Nigeria, where it is a rare gender-neutral name. Not in comparison with a country's population, this name is the most popular in Nigeria, Ethiopia, and Indonesia. Also, Еффа is the last name as well as the forename.