Marquess of Chai, Cài Shū Dù, 蔡叔度, 28,1

Ji Du was the fifth son of the founder of the Zhou dynasty. He was also called Shu Du, Chua Siok-To, Cua Shan Weng.

Shu Du was made the first ruler of the State of Cai by King Wu after the overthrow of the last Shang king, Zhou. Du's realm centered on present-day Shangcai, Henan. He and his brothers Guan Shu and Huo Shu were known as the Three Guards, but when King Wu died and the Duke of Zhou assumed the regency for the young King Cheng, they rebelled along with Wu Geng. The Duke of Zhou was able to suppress the rebellion and Du was exiled, although Cheng eventually recreated the realm of Cai as a grant to Du's son Ji Hu.

In exile, he settled in Siongque Village and founded the Cai Clan, a name which was Romanized through the generations as Cua, Chua, Choy, Choi or Tsoi.

Sources:

• Cua Clan Genealogy. Siongque, Fookien, China.
• Lucero, Todd. "Jose Rizal's Chinese Lineage". Cebu Daily News. 30 December 2002.
• "Shu Du of Cai". Wikipedia. http://bit.ly/MIcK8E. Date published: 09 May 2012. Date accessed: 30 June 2012.
• "Trivias about the Dr. Jose P. Rizal's roots in Fujian, China". Philippine-Trivia. http://bit.ly/N5gyP0. Date accessed: 30 June 2012.