Pak Yonggyu
Pak Yŏnggyu () was a Korean general who served Later Baekje. He was the son-in-law of its king, having married Kyŏn Hwŏn's daughter. When Kyon Hwon escaped to the rival kingdom of Goryeo after being overthrown by his son, Pak also defected to Goryeo. Pak was the father of Lady Dongsanwon, Queen Mungong, and Queen Munseong. Life
In March 935, Pak Yonggyu's father-in-law, Kyon Hwon was overthrown in a palace coup and imprisoned at Geumsansa Temple (금산사, 金山寺) by his oldest son, Kyŏn Sin-gŏm, then in June, Kyon Hwon escaped and fled to Goryeo. In September 936, after secretly discussing and consulting with his wife, Princess Kyŏn Aebok, Pak sent an envoy to Goryeo to express his intention to defect and said that he would welcome the Goryeo army. Goryeo's king, Wang Kon, then rejoiced greatly about this and treated that messenger generously and sent him back to Pak. Later, when Wang Kon finally won in attacked the Later Baekje, Pak helped to contribute to the unification of Later Three Kingdoms. After this, Wang Kon rewarded Pak Yonggyu with land of an area of 1,000 kyŏng (1,000경(頃)). Wang Kon also granted Pak's wife with 35 horses (역마 35필) and gave their two sons government posts. Due to Pak's contribution in helping Wang establish the new Goryeo Dynasty, Pak then officially titled as one of the Three Major Grand Lords (삼중대광, 三重大匡), along with Yu Ch'on-gung and Hwangbo Chegong. Since Pak was the one of Three Major Grand Lords, both him and his wife had a good relationship with Taejo of Goryeo, they regarded and treated each other like siblings. Because of this too, Pak's oldest daughter became 17th wife of Taejo and his other two daughters became the first and second wives of Taejo's son, Jeongjong of Goryeo. Family 
Wife: Princess Kyŏn Aebok
 Mr. Bak (박씨) – 1st son. Mr. Bak (박씨) – 2nd son. Lady Dongsanwon  – 1st daughter. Queen Mungong  – 2nd daughter. Queen Munseong  – 3rd daughter. In popular culture
Portrayed by Im Hyuk-joo in the 2000–2002 KBS1 TV series Taejo Wang Geon. Portrayed by Kim Sang-soon in the 2002–2003 KBS TV series The Dawn of the Empire. Portrayed by Choi Byung-mo in the 2016 SBS TV series Moon Lovers: Scarlet Heart Ryeo. See also
Who also held the title as Samjung Daegwang:
Yu Chon-gung
Hwangbo Je-gong

References

External links
Bak Yeong-gyu on Encykorea . Bak Yeong-gyu on Doosan Encyclopedia . Bak Yeong-gyu on Goryeosa . Year of birth unknown
Year of death unknown
Date of birth unknown
Date of death unknown
Place of birth unknown
Place of death unknown
Later Baekje people
Silla people
Goryeo people