Cognomen 랑 (Rang 
, Lann 
, 랑) , in the entire world, is a common family name. The cognomen 랑 is habitual in Estonia, where it is quite a rare surname, Sweden, and Myanmar. Not in comparison with a country's population, it is commonest in India, Myanmar, and China. Likewise, 랑 is the forename as well as the last name.