Cai (surname)

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RomanizationMandarin: Cai (Pinyin), Tsai (Wade-Giles)
Choi, Choy or Tsoi in Hong Kong and Malaysia
Chua or Chuah (Hokkien, Teochew), Chai (Hakka)
Cantonese: Choi
Taishanese: Toy, Toi
Indonesia: Tjoa
Chua'or 'Chuah' Philippines
PronunciationChua: /ˈtʃuwa/
in other Anglophone countries outside the Philippines: /ˈtʃwa/
Chinese name
Vietnamese name
Vietnamese alphabetThái or Sái
Korean name
Japanese name

Cài (Chinese: ) is a Chinese surname that derives from the name of the ancient Cai state. The surname is the 34th most common surname in China,[1] but the 9th most common in Taiwan, where it is usually romanized as Tsai based on Wade-Giles romanization of Standard Mandarin[2] and the 8th most common in Singapore, where it is usually romanized as Chua, which is based on its Teochew and Hokkien pronunciation. Koreans use Chinese-derived family names and in Korean, Cai is 채 in Hangul, Chae in Revised Romanization,[3] It is also a common Cantonese name in Hong Kong where it is romanized as Choy, Choi or Tsoi. In Macao and Malaysia, it is spelled as Choi, in Malaysia and the Philippines as Chua, in Thailand as Chuo (ฉั่ว).[citation needed] Moreover, it is also romanized in Cambodia as either Chhay, Chhuor or Chhor among Chinese Cambodians and as Tjoa or Chua in Indonesia.


The Cais are said to be the descendants of the 5th son of King Wen of Zhou, Ji Du. Ji Du was awarded the title of marquis (hóu) of the State of Cai (centered on what is now Shangcai, Zhumadian, Henan, China), and he was known as Cai Shu Du ("Uncle Du of Cai"). Together with Guan Shu and Huo Shu, they were known as the Three Guards. When King Wu died, his son King Cheng was too young and his uncle, the Duke of Zhou, became regent. Seeing that the power of the Duke of Zhou was increasing, the Three Guards got jealous and rebelled against Zhou together with Wu Geng. The Duke of Zhou suppressed the rebellion, and Cai Shu was exiled. King Cheng reestablished Cai Shu’s son Wu or Hu as the new Duke of Cai. Some 600 years later in the Warring States period, the State of Chu conquered Cai in 447 BC and was itself conquered by the Qin state which, in turn, formed the Qin Empire, China's first empire. With the spread of family names to all social classes in the new empire, many people of the former state of Cai began to bear it as a surname.

The Cai descendants have undertaken two major migrations. During the Huang Chao Rebellion (AD 875) at the end of the Tang Dynasty (AD 618-907), the Cai clan migrated to Guangdong and Fujian provinces. Another later migration occurred when Ming Dynasty loyalist Koxinga moved military officials surnamed Cai and their families to Taiwan in the 17th century. As a result, the surname is far more common in these areas and in areas settled by their descendants (e.g., Southeast Asia) than in other parts of China.

Transliteration and romanization[edit]


Cai is written the same (蔡) in both simplified and traditional Chinese characters.

In Mandarin Chinese, the surname is transliterated as Cài in pinyin and Tongyong Pinyin, Ts'ai in Wade-Giles, and Tsay in Gwoyeu Romatzyh. In Southern Min or Taiwanese, it is Chhoà in Pe̍h-oē-jī. In Cantonese (Hong Kong and Macao), it is Coi3 in Jyutping and Choi in Yale. (This should not be confused with the predominantly Korean family name Choi which has a different character [崔]). In Hakka it is Tshai in Pha̍k-fa-sṳ. (In Tongyong pinyin, it is Cai in Siyen Hakka and Ca̱i in Hoiliuk Hakka.) In Fuzhou dialect, it is Chái (in Bàng-uâ-cê).

Other languages[edit]

Koreans use Chinese-derived family names and in Korean, Cai is 채 in Hangul, Chae in Revised Romanization, and Ch'ae in McCune-Reischauer.

Vietnamese also use Chinese-derived family names. In Vietnamese, the name is Thái. The Chinese name 蔡 is usually transliterated via Sino-Vietnamese as Thái but sometimes as Sái.

Japanese do not use Chinese family names but for Chinese in Japan who carry the name, it is さい in Hiragana and Sai in the major romanization systems.


Cai is romanized as Cai in the People's Republic of China, Tsai (or occasionally Tsay or Chai for Mandarin) or "Tsoa" in the Republic of China (Taiwan), and Choi or Choy in Hong Kong and Malaysia. In Malaysia, Singapore, and Brunei, the most common forms are Chua or Chuah for Teochew and Hokkien speakers, Chai for Hakka speakers, Choi or Tsoi for Cantonese speakers, and Toy or Toi for Taishanese speakers. In Indonesia, it is usually romanized as Tjoa (old (dutch) spelling) or Chua (current spelling) and in the Philippines, it is Chua /ˈtʃuwa/ or Cua (/'kuwa/ or /kwa/). Chua is pronounced /ˈtʃwa/ in other Anglophone countries outside the Philippines.

Other variations include Chye and Coi.

Derivative names[edit]

In addition, some of the Chuas (Cais) who resided in the Philippines adopted Spanish names to avoid persecution by the Spanish rulers during the Philippines' Spanish colonial rule from the early 16th to late 19th century. Hispanicized forms of the name include Chuachiaco, Chuakay, Chuapoco, Chuaquico, Chuacuco, Chuason, Chuateco, and Chuatoco.[4] These names were formed from the surname, one character of the given name, and the suffix "-co", a Minnan honorific ko (哥), literally meaning "older brother".[4]

In Thailand, most Thais of Chinese descendance use Thai surnames. Legislation by Siamese King Rama VI (1910-1925) required the adoption of Thai surnames which was largely directed at easing tensions with Chinese community by encouraging assimilation. Thai law did not (and does not) allow identical surnames to those already in existence,[5] so ethnic Chinese formerly surnamed Chua incorporating words that sound like "Chua" and have good meaning (such as Chai, meaning "victory") into much longer surnames.

Notable people[edit]

Cai Wenji, also known as Cai Yan, a Han Dynasty poet and composer

See also[edit]

  • Choa Chu Kang (蔡厝港 Càicuògǎng, literally "Cai house harbor"), a suburban area in the West Region of Singapore
  • Choi Uk Tsuen (蔡屋村 Càiwùcūn, literally "Cai house village"), a village in the Yuen Long district of Hong Kong
  • Choy Gar (蔡家拳 Càijiāquán, literally "Cai family fist"), a Chinese martial art that was created by Choy Gau Yee (蔡九儀)
  • Choy Li Fut (蔡李佛拳 Càilǐfóquán, literally "Cai, Li, and Buddha's fist"), a Chinese martial arts system named to honor the Buddhist monk Choy Fook (蔡褔) among others
  • Choy Yee Bridge Stop (蔡意橋站), a MTR Light Rail stop in Hong Kong
  • 2240 Tsai, an asteroid named after Taiwanese astronomer Tsai Changhsien


External links[edit]