Helene Wee - Puan Sri Tan Chin Tuan  (Ah Mak) was 1 of  7 daughters

Ah Mak and 5 elder sisters 

Wee Yew Neo (from WEE Theam Seng and their father's first wife)
Children from the union of Ah Mak's parents WEE Thean Seng and his 2nd wife HONG Buan Neo included;
Wee Swee Neo
Wee Inn Neo
Wee Ek Neo 
Wee Kim Sian
Helene Wee
 
The 6 daughters of WEE Theam Seng in turn married;
Wee Yew Neo married KWA Siew Tee
Wee Swee Neo married Yeo Chiang Swee
Wee Inn Neo married GAW Khek Swee
Wee Ek Neo married GAWKhek Chiew
Wee Kim Sian married LAUW Pek Tjin
Helene Wee married TAN Chin Tuan

Wee Yew Neo and KWA Siew Tee had 9 children, 5 sons and 4 daughters;
KWA Soon Hock
KWA Soon Lock
KWA Soon Chuan
KWA Soon Bee - who was Singapore's Minister for Health
KWA Soon Thay
Cheah Geok Neo
KWA Geok Lan
KWA Geok Choo who married LEE Kwan Yew
Lau Geok Lan
Kwa Geok Eng

Wee Swee Neo and Yeo Chiang Swee had 0 children, 0 sons and 0 daughters;

Wee Inn Neo and GAW Khek Swee had 0 children, 0 sons and 0 daughters;

Wee Ek Neo and GAWKhek Chiew had 0 children, 0 sons and 0 daughters;

Wee Kim Sian and LAUW Pek Tjin had 0 children, 0 sons and 0 daughters;

Helene Wee and TAN Chin Tuan had 3 children, 1 son and 2 daughters;
Tan Khen Siong
Tan Kheng Lian
Tan Kheng Choo

As you can probably appreciate, growing up with so many Grand-Aunts, which was like having lots of lovely extra grannies, however when introduced & re-introduced to them by Ah Mak, they were refereed to as gok-i-poh, sa-i-poh, lak-i-poh, etc which only later in my teens did I discover was just a numbering system..... 

At Chinese New Year when organised chaos reigned, what with all the various families, relatives, friends and business acquaintances (along with their families) coming to visit Mak and Kong, everyone more or less mother's age just became Uncle or Aunty, and anyone older were addressed as kong-kong (grand-uncle) and or poh-poh (grand-aunt).... I remember that Ah Mak's the poh-poh's in her various mah-jong groups tended to had out the larger Ang-Pows!

That said kong-kong William 2 thumbs (I think his family name was Ow) always give us at least SG$ 10 if not more, and Jacob Ballas probably to please Ah Mak would usually give us SG$ 20, this was in the 1970's (what is not refereed to as the roaring 70's) and when I look back the guests really were the WHOS WHO in the ZOO of Singaporee at the time, we would be very busy acting as greeters and was a most enjoyable and rewarding task as would usually manage to collect between SG$ 2k - 3k over the fist 3 days of CNY !!'