Ong was born in 1936 in Kuala Lumpur, Malaysia. His ancestral home is in Jiangdou, a small village in Fuqing, Fujian, China. His father Ong Cho Tek (Chinese: 王祖德; pinyin: Wáng Zǔdé) was a businessman dealing in the early car and bicycle spare parts trade in Singapore and Malaysia.[1] He has 18 siblings.
Personal life
Ong and his wife, Goh Soh Meng, were married on the 22 December 1962 in St Kilda, Victoria.[2] They have 2 children.