One: From the surname of Ji , with the country as the clan. According to the "Last Name Garden", King Zhou Kang sealed Tang Shuyu 's youngest son Gongming in Jia State, called Jia Bo, a small country of vassals. Later, Jia State was destroyed by Jin State, and the descendants of Jia Bogongming used the original country name Jia as the clan. Two: The name is Yap. After the Jin Dynasty destroyed Jia, it became a city called Jia Ji. Thereafter, the name was Yap. Emperor Jinhui Emperor is his descendant.
Jia surname distribution
The contemporary Jia surname has a population of nearly 3.7 million and is the 69th surname in the country, accounting for approximately 0.29% of the national population. From the Ming Dynasty to the present 600 years, the population of Jia surging from 250,000 to 3.7 million, an increase of more than 14 times. The growth rate of Jia surging is higher than the national population. . In the 1000 years since the Song Dynasty , the growth rate of Jia's population has been V-shaped. The distribution across the country is currently concentrated in the three provinces of Hebei, Henan and Shanxi, accounting for about 45% of the total population of Jia, followed by Shandong, Gansu, Heilongjiang, Sichuan, and Shaanxi. Jia in these five provinces has concentrated another 25% . Hebei has 18% of Jia's total population, making it the largest province in Jia. There are two high-rate Jia surname regions in the north of Henan, Hebei, Shanxi, and Sichuan in the south. During the 600 years, the degree and direction of population movement of Jia surnamed was very different from that of the Song, Yuan and Ming Dynasties. The population movement was a strong return from the east to central and north China, and accelerated to the west. The frequency distribution of Jia surnames in the population shows that in Hebei, Henan, Jinjin, central Inner Mongolia, most of Shandong, northwestern corner of Jiangsu, northern Anhui, northern Hubei, most of Shaanxi, central and western Gansu, southern Ningxia, and western Liaoning In northern Heilongjiang, the surname of Jia usually accounts for more than 0.57% of the local population, and some reach more than 2%. The area covered by the above area accounts for about 23.2% of the total land area, and about 62% of the population of the surname Jia lives. In the east of Qinghai Lake, other areas north of the Yangtze River, and northwest Xinjiang, the proportion of Jia surname in the population is between 0.19% and 0.57%, and its coverage area accounts for about 33% of the total land area. About 31% of the Jia surname crowd.
Jia Sizhen (472-499), a famous agronomist in Northern Wei Dynasty, wrote a book called Qi Min Yao Shu. It plays an important role in the history of Chinese agronomy and the history of world agronomy.
Jia Yan (730-805) is a famous statesman and geographer. The main achievement is The Map of China and Other Geographic Books. Jia Yan inherited and developed the method of scientific cartography, which has a profound impact on later cartography.
Jia Xian, a famous mathematician in the Northern Song Dynasty. The main achievements are the "Jiaxian Triangle" and the "increase, multiply, and open methods".