Last name ارنى (Ernie 
, ارنى) , around the globe, is quite a rare surname. The cognomen ارنى is habitual in Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Hong Kong. In absolute terms, it is commonest in South-eastern Asia, particularly Indonesia, Malaysia, and Philippines. Much more frequently, ارنى is the forename as well as the last name.