Mu Pai Nai was a Jianzhou Jurchen leader who invaded the north of Joseon, but was defeated by Yi Sun-sin and his army in 1583. Right after his capture, he was executed by Yi Sun-sin. Despite his real name, the Koreans still refer to him as a Jurchen (Hangul: 여진족 Hanja:女眞族).
References
Mu Pai Nai Wikipedia(Text) CC BY-SA