There are several theories about the origin of Gan's family:

One: take water as the surname, and Jiangxi Yongxiu has this surname; Ganshui, which originates in the southeast of Yu Qingjiang County, comes out of the mountain and flows northward into Ganjiang River via Zigan Mountain.

Second: When he was in the northeast of China, a senior official named Jin committed a lawsuit. In order to let him avoid the lawsuit, someone secretly pleaded for Song Gaozong. Song Gaozong pointed out a flexible way to let him go to the south anonymously to avoid the punishment of the court. Later, a senior official named Jin came to settle in Yongxiu County, Jiangxi Province, and added three points of water in front of the surname Jin, which changed from Jin to Gan.

It is said that every corner of the Southern Song Dynasty was attacked by the Northern Jin Dynasty, and many talented people in the Southern Song Dynasty went to the imperial court to remonstrate against the northern Jin Dynasty. Among them, a righteous man named Jin in the south attracted the attention of the court. In order to distinguish this righteous man named Jin from the Northern Jin Dynasty, the court specially added three points of water next to the Jin Dynasty and changed his surname to Gan.

Fourth, the surname of Gan originated from the surname of Jin in Poyang County, Jiangxi Province, and relied on officials to save history. Because Jin was at war with the Southern Song Dynasty, kings everywhere were ordered to be diligent. When his face was sacred, Emperor Gaozong heard a eunuch say "The Nomads from the Golden Army came" in his sleep and got the dragon under the table. Later, when he saw Lai come in, he said, Ai Qing, your name is not pleasant to listen to, so add three points in front of the golden word.

Five: Ganyuan's surname is Jin, and he is a descendant of the Xiongnu prince who killed the city on behalf of the king. It is said that one day when I was reading the approval document, I came across the granting system of a Jin surname, hoping to make sense. He thought of the evils of Jin, such as adding three points of water to Phnom Penh, changing sweetness and washing away the shame of gold. Today, many descendants of Gan in Jiangxi are derived from this.

Gan's Genealogy is a preface written by Lu Jiuyuan, a great scholar in Song Dynasty. According to genealogical records, when reading the memorial of Lai, the envoy of our province, his surname was similar to that of Jin Binglai, so he called Gan Binlai. From the above "Ganbin", we can shape his ancestor "Jin". In addition, the records about the origin of the clan are vague, but the origin is Jin Ridi, the prince of Xiutu, the Xiongnu king of the Han Dynasty, and Jin Ridi was later worshipped as a general riding a car and was named the Marquis.

The genealogy also records that Gan and Gan's father (whose name has been forgotten) lived in the Ming and Qing Dynasties (asylum here refers to exile). Guidance for elders to cross the river: Liaofangzhou, Jiuhe Township, Yongxiu County, Jiangxi Province, has a "dragon" terrain (surrounded by water, and there are elk cranes on the continent), which is a blessed land, so it has settled down and made a fortune so far. At present, the Gan surname in Yongxiu County is a descendant of Hehe. Guo Rong moved out of Liao Fang, and now there are nearly 1,000 households in Liaofang Village, with no mixed surnames. More than half of the surnames in Jiuhe Township are from Guo Ying.

A Qing and Wang Shizhen wrote "Liu Cong's Family": "There are many Cong's families in Jiangxi, and the old biography is also after Jin Ridi. The person who has a golden gift is a chef, and Song Gaozong needs to add some water, so he has a surname. "

To sum up:

The first statement is too general to be believed;

Second, the three statements are speculations of later generations, which are not supported by historical materials and are not credible;

The fourth statement has certain credibility, but it is too playful to be believed completely;

The fifth statement is more credible, because it is similar to the records in the genealogy, and it is similar to the statement in Wang Shizhen's A Talk on Red North in the Qing Dynasty, but it should be Gan (Jin) guests, not, and the specific details should be subject to the genealogy.

Pushing up again should be the Xiongnu prince with a butcher (as evidenced by Gan's genealogy and A Talk about Red North), that is to say, the descendants of the Gan family may all be descendants of Xiongnu, but after more than a thousand years, they have basically been sinicized (it is said that in every generation of the Gan family, there are always tall, burly and strong, with wide shoulders and long legs, long black hair and high nose).

Gan's surname is mostly in Yongxiu, Jiangxi. As for Sichuan Ganyi Middle School, it is said that in the late Ming Dynasty, the clansman Gan organized his own soldiers to defend the southern part of the motherland, and after the defeat, the clansman was scattered in the mountainous areas around Sichuan. This is handed down from ancient times, and there is no exact textual research. Another guess may be that Huguang moved to Sichuan during the filling period in Sichuan. Nanchang, Yueyang, Hunan and Taichung, Taiwan Province are also distributed.