High Quality Content by WIKIPEDIA articles! 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 Pak Chang-do. Wonseong`s queen was Lady Yeonhwa, the daughter of Gakgan Kim Sin-sul.