Family name オア (Orr 
, オア 
) , worldwide, is a common cognomen. The surname オア is characteristic of Trinidad and Tobago, where it is quite a common surname, New Zealand, and Isle of Man (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Canada. Very seldom, オア is the forename as well as the last name.