Across the world, Hullo (Hullo 
, Hylo 
) is a rare gender-neutral first name. The forename Hullo is characteristic of Nigeria, where it is a very rare gender-neutral name, India, where it is a very rare largely girly, but infrequently masculine name, and Brazil, where it is an extremely rare masculine name. Also, Hullo is the last name as well as the forename.