Last name Irah (Irah 
) , around the globe, is quite a rare family name. The cognomen Irah is characteristic of Brunei, where it is quite a rare surname, Mauritius, and Singapore, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in South-eastern Asia, particularly Indonesia, Malaysia, and Singapore. Also, Irah is the forename as well as the last name.