Wonseong of Silla

Wonseong of Silla (r. 785–798, died 798) was the 38th to rule the Korean kingdom of Silla. He was a twelfth-generation descendant of King Naemul. His father was Kim Hyo-yang, and his mother was Lady Gye-o, the daughter of Park Chang-do. Wonseong's queen was Lady Yeonhwa, the daughter of Gakgan Kim Sin-sul.

Wonseong of Silla ruled out the Resolution of the Ji-jeong with the Yang-sang in 780 before becoming king. He killed Hyegong of Silla and contributed to the throne. From this point of view, he is a figure closely related to his appearance and has been opposed to the monarchy of the royal family since King Gyeongdeok. Hyegong of Silla was appointed to Sangdaedeung in 780 (King Seongdeok 1) for his work to calm down the turmoil at the end of King Hyegong's reign.

In 780, Wonseong fought alongside his kinsman Kim Yang-sang to defeat the rebellion of Kim Ji-jeong. The rebellion left King Hyegong dead, and Kim took the throne as King Seondeok. The new king gave Wonseong the title of sangdaedeung. After Seondeok died without an heir, the nobles chose Wonseong as the new king.

In 787, Wonseong sent tribute to Tang China and requested a title. In 788, he established the national civil service examination for the first time, on the Tang model.

After his death in 798, the king was buried south of Bongdeoksa.

Family
Parents Consorts and their respective issue:
 * Father: Kim Hyo-yang
 * Mother: Lady Gye-o, the daughter of Prak Chang-do
 * Queen Kim (Lady Yeonhwa; ), of the Kim clan, the daughter of Gakgan Kim Sin-sul
 * Son: Crown Prince Hyechung (750–791/792), posthumously named King Hyechung
 * Daughter-in-law: Queen Seongmok, of the Kim clan ( 성목태후 김씨)
 * Grandson Soseong of Silla (died 800)
 * Grandson: Heondeok of Silla (died 826)
 * Grandson: Kim Chung-gong
 * Grandson: Heungdeok of Silla (777–836)
 * Daughter-in-law: Concubine Park
 * Grandson: Huigang of Silla (died 838)
 * Grand-daughter: Princess Gwibo
 * Son: Prince Uiyeong (의영; d.794), posthumously named Crown Prince Heonpyeong
 * Grandson: Prince Sungbin
 * Son: Prince Ye–yeong, posthumously named King Hyegang
 * Grandson: Prince Heonjeong
 * Grandson: Prince Kim Gyun-jung
 * Grand-daughter: Madam Gwiseun – became Queen Consort of Heondeok of Silla
 * Daughter: Princess Daryong
 * Daughter: Princess Soryong