Cognomen 乐康 (乐康 
, Lekang 
) , around the world, is quite a rare surname. The surname 乐康 is characteristic of Botswana, where it is quite a common surname, Norway, where it is quite a rare surname, and Denmark, where it is a very rare surname. In absolute terms, it is commonest in China, Botswana, and Norway. More prevalently, 乐康 is the forename as well as the last name.