Biyu of Baekje

{{Short description|20th King of Baekje (r. 427–455)}}

{{Other people|Biryu}}

{{Infobox Korean name

|hangul=비유왕

|hanja=毗有王

|rr=Biyu-wang

|mr=Piyu-wang

}}

{{Baekje monarchs}}

Biyu (died 455, r. 427–455) was the twentieth king of Baekje, one of the Three Kingdoms of Korea.

According to the Samguk sagi he was Guisin's son, while other sources name Biyu as the illegitimate son of the 18th king Jeonji. It is not known which sources are right. (Since Guisin died young, it is likely that the stories about Biyu being Jeonji's son may be possible.){{cite web|url=https://www.doopedia.co.kr/doopedia/master/master.do?_method=view&MAS_IDX=101013000893496|script-title=ko:전지왕|publisher=Doopedia|accessdate=27 August 2021|language=ko}}{{cite web|url=http://db.history.go.kr/item/compareViewer.do?levelId=sg_025r_0060_0010#sg_025r_0060_0010_f002_comment|script-title=ko:비유왕이 즉위하다 ( 427년 12월(음) )|publisher=한국사데이터베이스|accessdate=27 August 2021|language=ko}}

The traditional dates of Biyu's rule are based on the Samguk sagi. On the basis of more contemporaneous Chinese records, Best (1979) has suggested that the years 428 or 429–455 are more plausible.

Within the Korean peninsula, Biyu sought to strengthen Baekje's relationship with Silla, exchanging ambassadors in 433 and 434. Although Silla was a protectorate of Goguryeo at this time, Silla and Baekje allied themselves against Goguryeo (Naje Dongmaeng; {{Korean|hangul=나제동맹|hanja=羅濟同盟|labels=no}}).