If I remember right, only the Hokkien Huay Kuan clan has school affliations. I am not familiar with any other clan affliations. Mostly, it's sister-brother school affliations (MGS-ACS etc)
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Singapore Hokkien Huay Kuan clan is associated to tao nan, ai tong, Nan Chiau Primary, Kong Hwa School and Chongfu School.