Surname Halii (Halii 
, Халий 
) , around the world, is a rare cognomen. The last name Halii is characteristic of Romania, where it is a rare surname, Morocco, where it is a very rare surname, and Nigeria. Not in comparison with a country's population, this name is the most popular in Nigeria, Tanzania, and Russia. Very seldom, Halii is the forename as well as the last name.