High Quality Content by WIKIPEDIA articles! The "Song of the Xianbei Brother" is a popular song of the Xianbei people composed by Murong Wei in 285 AD. It is preserved in Chinese translation and is about the Xianbei chief`s regrets for having sent his brother away to the West. The original Chinese translation left the Xianbei word for elder brother (A-kan) in the title, which is identical to the Mongolic word for elder brother (Aqan or Aghan). The same word exists in Turkic and Tungusic languages, but the Xianbei are generally considered Mongolic peoples. This would make the song one of the earliest attestations of a Mongolic language. The song was first translated into English in 1939.