Taejo of Goryeo
During the age of Baekje, the area was named Masaryang-hyeon(馬斯良縣). When it came under the rule of Silla, King Gyeongdeok changed its name to Daero(代勞) and placed it under Boseong County. In 940 (Taejo of Goryeo 23), it was renamed as Hoeryung and placed under Jangheungdohobu. Under the rule of Josun, it continued to be called Hoeryung.