《容斋随笔·卷六·姓氏不可考》
姓郭的源出虢，可是晋国则有郭偃，齐国有郭最，还有个叫郭公的人。
郭氏出于虢，而晋有郭偃，齐有郭最，又有所谓郭公者。
The surname Guo originated from Guo, but the state of Jin has Guo Yan, the state of Qi has Guo Zui, and there is also a person called Guo Gong.