Tan Chin Tuan and Kwa Siew Tee are descendents of Malacca Baba gang and later became members of the Emerald Hill gang. Lee and Teo are part of Tan Kah Kee Fujian Bukit Gang. TCH is from Tan Kah Kee's wife' side. OCBC is a merger of a number of banks. They are not blood related but late generations have bloodlines running up to the following 4 headmen.
Ther 4 prominent bloodstock involved are - Tan Tock Seng, Tan Kah Kee , Tan Lark Sye and Lee Kong Chian.