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- Sons :
- Dr. Koh Chuan Keng
Koh Chuan Seng (James)
- Daughters-in-law :
- Dr. Chiu Chiaw Ling
Teoh Yin Meng
- Daughter:
- Koh Lai Peng
- Son-in-law:
- Tan Gan Fatt
- Grandchildren:
- Koh Wan Xian
Koh Wan Yi
Koh Wan Qin
Tan Kah Seng
- Grandchildren:
- Jocelyn Koh Su Lin
Justine Koh Wei Lin
Jeanne Koh Miew Lin