Paekche royalty

Soseono (; 66/7 – 6 BC) or Yeon Soseono () was the second wife of King Dongmyeong and a key figure in the establishment of both Goguryeo and Paekche. She was the mother of Biryu and Onjo.

Biryu (?-?) was the second son of Jumong and So Seo-no, and older brother of Onjo, the traditionally recognized founder of Baekje (18 BCE–660 CE), which was one of the Three Kingdoms of Korea. In an alternate legend, Biryu himself is described as the founder of Baekje.