《梦溪笔谈·神奇》
我翻查《图经》，雷州境内有雷、擎两条河，雷水经过城下，因此其地就因水名而叫雷州。
按《图经》，雷州境内有雷、擎二水，雷水贯城下，遂以名州。
I checked the illustrated book, there are two rivers called Lei and Qing in Leizhou, Lei stream went through the town, therefore the place was called Leizhou due to the water name.