ONE Profile: ONE Facts and Ideal Type ONE (원) is a South Korean solo singer who debuted on July 11, 2017 under YG Entertainment. On July 17, 2019 he left YG Entertainment and opened his own entertainment company called Private Only. Stage Name: ONE (원) Birth Name: Jung Jae-won (정제원) Birthday: March 29, 1994 Zodiac Sign: … Continue reading ONE Profile