Cao origin has six:

1, given by the officer of cao's for officer

In the process of the development of human society, people and nature of the struggle is the most difficult and floods.According to legend in ancient times, our motherland is hiromi "water", so there have been "water" reed ash deposition to check her famous goddess nuwa.Live in (now in henan huixian) in water conservancy family of gong gong clan is passed from generation to generation.It is said that when ZhuanXu, gong gong with ZhuanXu contend for "mercy", the battle, gong gong tried to flood water ZhuanXu, results are ZhuanXu kill.But gong gong's descendants still make water officer, held the office of water conservancy in the tribal alliance.The period of "huaxia tribes alliance" the water-control hero emerged Gun and yu.Although Gun worked hard efforts, but water conservancy was not a success.Later, yu Gun are summarized with plug flow method and the harnessing of embankment failure lessons, to switch to dredge rivers, channel block (hydrophobic sichuan lead lag)The floodCause seamlessly from small to big, method of flow of the river, finally put the floods, the damage to water conservancy.

When dayu water conservancy, land throughout the first five (the other for the sixth son) Ann is timely, he with active and water conservancy was given cao officer.Cao is the "center" for the prison, escort officer, a slave, to suppress the slaves at the time as the main function of the slave owners regime is not a small officer.Ann for officer's later.This is cao surname.

Along the beginning in this spi county, henan cao water, here is the land along the surname.Along for the dynasty monarch, near a czy pit, czy market.

Along by yu later.Why to attack cao yu?Reason is that in the process of growing union, will east YiZu most fusion, yu is the last of the three tribe alliance leader, according to legend in later years he had presented the east YiZu princes "yi do heir, but secretly to preach to the child, to his son and cultivating wings.Three years later he yi give power to the yu son of qi.Probably because of yao and shun, shun to yu, is implements the system of demise, but from yu to qi is the son, therefore cause, tenure, cao wei, flexor Ao's dissatisfaction and opposition, such as Yu Shiyu cao.Forced by tapping, cao cao in henan huaxian county enjoys, namely so-called "preface", "wei DE man's defeat, in cao".

To shang destroyed after summer, cao and often against shang dynasty, became a party, called icy.Because, by discussing and moving east in the dingtao county in shandong.Henan huaxian county enjoys cao is brief in the early years of the western zhou dynasty become Cao Yi wei.In 660 BC, defeated by zhai wei, cao (with cao) city is occupied by zhai, the offspring of the original sealed in cao wei towns with the ancestors of the principality of "tank" as a surname.Uncle in the han dynasty have ranger cao, cao less games."Thousands of name is" cloud: walking race (now in henan, huaxian county enjoys 濬 county and di south and north area).Cao's evolved into bad's again, "annals · clan just six" sequel: master Ming jiajing bad soil.

2, the sealing cao's for countries

From ZhuanXu emperor's descendants.Legend ZhuanXu emperor is the son call back to wu, when emperor emperor ku was ravaged by fire.Son of wu back to eventually marry ghost fang lu female (female), the daughter of, giving birth to six sons, its five name Ann, cao, sealed in the cao.Weeks, featuring change seal along the descendants of cao Zhu relied on state (now southeast of shandong qufu).The warring states period, was destroyed by king ChuXuan Zhu countries.After Zhu people in some countries as's, instead of zhu's;Some for cao's, still be around.