In various inscriptions on monuments on the 13th king Munmu of Silla, it is recorded that King Munmu possibly has partial Xiongnu ancestry, via the Han dynasty general Jin Midi. According to several historians, it is possible that this unknown tribe was originally of Koreanic origin and joined the Xiongnu confederation. Later the tribes ruling family returned to Korea and married into the royal family of Silla. There are also some Korean researchers that point out that the grave goods of Silla and of the eastern Xiongnu are alike, and some researchers insist that the Silla king is descended from Xiongnu. The Korean public broadcaster KBS has produced a documentary about this subject.