Last name Malachy (Malachy 
, Малачи 
) , globally, is quite a common cognomen. The family name Malachy is characteristic of Nigeria, where it is quite a rare surname, Ireland, where it is a rare surname, and Hungary. Measured by absolute frequency, it most frequently occurs in Nigeria, Russia, and Hungary. Likewise, Malachy is the forename as well as the last name.