Surname Ljusi (Люси 
, Ljusi) , in the world, is a very rare family name. The surname Ljusi is habitual in Bulgaria, where it is a rare surname, Armenia, and Kyrgyzstan, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Bulgaria, Russia, and Armenia. More prevalently, Ljusi is the forename as well as the last name.