Origins
Ren-Lineage Origin
One account traces the surname to Kuangquan, a Ren-surnamed descendant of the Yellow Emperor, whose line later formed the Kuang clan; Kuang Qushu is also placed in the Yellow Emperor's era.
Reference: 狂_狂姓氏起源来源_狂姓氏名人查询_姓氏大全:狂
State, Personal-Name, and Hydronym Origins
Three other accounts derive the surname from the ancient state of Kuang, from descendants of the Spring and Autumn-period Song official Kuang Jiao, or from the Kuang River.
