Cognomen Дуку (Ducu 
, Дуку 
) , across the world, is quite a rare surname. The last name Дуку is characteristic of Romania, where it is quite a rare surname, Kyrgyzstan, where it is a very rare surname, and Italy. Not in comparison with a country's population, it is commonest in Romania, the United States, and Italy. Likewise, Дуку is the forename as well as the last name.