Cognomen نیال (Niall 
, نیال) , in the world, is a rare last name. The last name نیال is characteristic of Andorra, where it is quite a rare surname, Ireland, and Australia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Australia, Ireland, and Hungary. Much more frequently, نیال is the forename as well as the last name.