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Across the world, Yên (Yen , Yên , 圓 ) is a common unisex forename. The first name Yên is characteristic of Macao, where it is quite a common girly name, Hong Kong, where it is quite a common largely feminine, but infrequently boy's name, and Brunei, where it is quite a rare feminine name. In absolute terms, the name is most common in Vietnam, the United States, and Indonesia. More frequently, Yên is the last name as well as the forename.
Yên is also a name for the fictitious and mythical characters: Yen Sid , the sorcerer from Disney's Fantasia (1940), Kingdom Hearts III; Yen Yen and Sing Sing , the musical character in the musical A Chinese Honeymoon by Howard Talbot; maids of honour to Soo Soo and Yen How , the musical character in the musical San Toy; a Mandarin.