Cognomen Onty (Onty 
) , all over the world, is a rare surname. The last name Onty is habitual in Botswana, where it is quite a rare surname, Bangladesh, where it is a rare surname, and Argentina, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Bangladesh, Botswana, and China. Likewise, Onty is the forename as well as the last name.