Surname オナ (Ona 
, Onna 
, オナ 
) , around the globe, is a common last name. The cognomen オナ is characteristic of Equatorial Guinea, where it is quite a common surname, Gabon, and Albania. Measured by absolute frequency, it is commonest in Nigeria, Philippines, and the Democratic Republic of the Congo. Likewise, オナ is the forename as well as the last name.