Qiulin (Chinese: 丘林) was the name of a royal tribe in old Xiongnu during from the Han Dynasty, to Northern Wei.
history
old Xiongnu royal has part of five tribe alike Luandi (攣鞮), Suibu (tribe) (須卜), Huyan (呼衍), Lan (tribe) (蘭), Qiulin (丘林). Luandi (攣鞮) tribe do production ruler of Xiongnu, other Suibu (tribe) (須卜), Huyan (呼衍), Lan (tribe) (蘭), Qiulin (丘林) do production an empress for Xiongnu ruler.
during the Northern Wei, Qiulin (丘林) tribe emigtated to Luyang, Henan. by the Chinese assimilation policy of Xiaowen, the Xiongnu Chinese of Qiulin (丘林) get surname Lin (林). they family are branch of Liu (劉) family of Han Zhao.
References
Qiulin Wikipedia(Text) CC BY-SA