Where is the mother's surname distributed?

Early mother's surname mainly lived in Shandong. During the Han and Tang dynasties, a noble family with county surname was formed in eastern Shandong, with Pingchang County as the county. Later, due to the war, officials, immigrants and the trip to Kanto in Ming and Qing Dynasties, it gradually spread to all parts of the country. The mother (Wu) family has a long history, but the number is small. Now it is Shan County, Tai 'an and Zoucheng in Shandong Province, Yongcheng, Xiayi County and Xinxiang in Henan Province, Jiange, Shehong, Langzhong, Cangxi, Yilong, Peng 'an and Zigong in Sichuan Province, Chongqing, Laoting, Xingtai, Zaoqiang and Zigong in Hebei Province.