Um (Korean: 엄), also spelled as Uhm, Eom, Eum, Ohm or Om, is a relatively uncommon surname in Korea.
[1] According to the 2015 census in South Korea, there were 144,425 people carrying the Eom surname.
The founding ancestor, Eom Im-ui (hangul: 엄림의; hanja: 嚴林義), was sent to Korea by Emperor Xuanzong of Tang, during Gyeongdeok of Silla's reign.
[4] He was said to be a descendant of the Han dynasty scholar, Yan Ziling (嚴子陵), known as Eom Ja-neung in Korean (엄자능).
Another member of this family became the consort of King Gojong, becoming the mother of the last crown prince of the Korean Empire, Yi Un.