"Jia" originated.

One: from Ji surname, taking the country as the surname. According to Yuan's surname, his youngest son was named Jia Bo, a small vassal state. Later, the State of Jia was destroyed by the State of Jin, and the descendants of Jia Bo took the original country name "Jia" as their surname. Two: take the city name as the surname. After the state of Jin destroyed Jia, it became a city called Jia Ji. Later named after the city. Queen Jin Huidi is her successor.

Jia surname distribution

The contemporary population of Jia is nearly 3.7 million, which is the 69th surname in China, accounting for about 0.29% of the national population. In the 600 years since the Ming Dynasty, the population of Jia surname has surged from 250,000 to 3.7 million, an increase of more than 14 times. The population growth rate of Jia surname is higher than that of the whole country (in fact, the growth rate of many surnames is very high). From the Song Dynasty to 1000, the population growth rate of Jia showed a V-shaped trend. At present, the distribution in China is mainly concentrated in Hebei, Henan and Shanxi provinces, accounting for about 45% of the total population of Jia family, followed by Shandong, Gansu, Heilongjiang, Sichuan and Shaanxi, where Jia family accounts for 25%. Hebei province has 18% of Jia's total population and is the largest province in Jia. The whole country has formed two regions with high Jia surname: northern Henan, Hebei, Shanxi and southern Sichuan. In the past 600 years, the degree and direction of Jia population movement were very different from those in the Song, Yuan and Ming Dynasties. Population migration is a strong migration from the east to China and North China, and it accelerates its migration to the west. The distribution frequency of Jia surname in the crowd shows that in Hebei, Henan, Shanxi, Jucie Jing, central Inner Mongolia, most of Shandong, northwest corner of Jiangsu, northern Anhui, northern Hubei, most of Shaanxi, central and western Gansu, northern Ningxia, western Liaoning and northern Heilongjiang, Jia surname generally accounts for more than 0.57% of the local population, and some of them reach more than 2%. The coverage area of these areas accounts for about 23.2% of the total land area. In other areas east of Qinghai Lake, north of the Yangtze River and northwest of Xinjiang, the proportion of Jia surname in the population is between 0. 19%-0.57%, accounting for about 33% of the total land area, and about 3 1% of Jia surname lives.

Jia Sixie (472-499), a famous agronomist in the Northern Wei Dynasty, wrote Qi Yao Min Shu. It occupies an important position in the agricultural history of China and even the world.

Jia Dan (730-805) was a famous politician and geographer. The main achievements are geography books such as Map of China People and Foreigners in the Sea. Jia Dan inherited and developed the method of scientific cartography, which had a far-reaching influence on cartography in later generations.

Jia Xian was a famous mathematician in the Northern Song Dynasty. What are the main achievements? Jiaxian triangle? 、? Multiplication method? .