Cognomen Dyu (Jew 
, Dyu 
) , globally, is a common family name. The family name Dyu is habitual in Malaysia, where it is quite a common surname, Ireland, where it is quite a rare surname, and New Zealand, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Malaysia, the United States, and Indonesia. Much less frequently, Dyu is the forename as well as the last name.