Family name 玉 (Yu 
, 玉 , 옥 
) , globally, is a prevalent last name. The cognomen 玉 is habitual in Mongolia, where it is a prevalent surname, Cayman Islands, where it is a widespread surname, and Hong Kong (explore the name in all countries). Measured by absolute frequency, the name is most common in China, Mongolia, and Myanmar. Much less frequently, 玉 is the forename as well as the last name.