Cao

Cao is a common Chinese surname with a history spanning over two millennia. Its origins are complex, with several branches tracing back to different historical figures and regions. One prominent origin is from the ancient State of Cao (曹國), a vassal state during the Zhou Dynasty (c. 1046–256 BC), whose descendants adopted Cao as their surname. Another significant origin is linked to the surname Ji (姬), the royal surname of the Zhou Dynasty, where some branches were granted the surname Cao.

The surname gained immense prominence during the Three Kingdoms period (220–280 AD) with Cao Cao, a powerful warlord who laid the foundation for the state of Cao Wei. His descendants continued to bear the surname, solidifying its place in Chinese history. Beyond its use as a surname, 'Cao' can also be a given name, often carrying meanings related to nature (grass, straw) or positive attributes (talent, ability), depending on the specific character used.