Ng got already.

Eng, u know the chinese character & race.?

Gan(颜) is Hokkien
Goh(吴) is not just hokkien, got teochew too

Chew = 赵

Ang = 洪(hokkien)
Au = (hakka)
Ban = (hokkien)
Bok  = (hainan)
Bong = (hakka)
Ch'ng - 庄(teochew)
Chan = 陈(cantonese)
Cheah = 谢(hokkien / teowchew)
Cheng
Cheong = 张(cantonese), 钟(hakka)
Chew = 赵
Chia = 谢(hokkien)
Chiang = 张(hainan)
Chin = 陈(hakka / sinning)
Chong = 张 / 钟(hakka)
Choong = 张 / 钟(hakka)
Chua = 蔡(hokkien / teowchew)
Chuah = 蔡(hokkien / teowchew)
Ding = 陈(hokchew)
Er = (teowchew)
Ewe = 尤
Fan
Fang = 方
Foo
Gan = 颜 (hokkien)
Goh = 吴(hokkien)
Gun = 颜
Hii = 许(hokchew)
Ho = 何(hakka)
Kam
Kim = 金(hokkien)
Khor = 许(hokkien / teowchew)
Ko = 高
Koh = 许
Kong = (hokchew)
Koay = (teowchew)
Lai = 黎
Lam = (hakka)
Lau = 劉
Lee = 李(hokkien / hakka)
Leong = 梁(hokkien), 龙
Li = 黎
Liew = 刘(hakka)
Lim = 林(hokkien)
Loh = 卢
Lok = 骆
Loo
Low = 罗
Lu = 呂
Ma = 马
Mak = 麦(cantonese)
Mok = 莫
Ng = 黄(hokkien / teowchew), 吴(hakka)
Ong = 王(hokkien / teowchew)
Ooi = 黄(hokkien)
P'ng = 方
Pang = 冯(hainanese), 庞(cantonese, hainanese), 彭(cantonese)
Phor = (hokkien)
Phua = 潘(hokkien)
Phuah = 潘(hokkien)
Quak
Sam
Seetho = 司徒
Seng = (hakka)
Siao = 萧
Sim
Sin = 申(hakka)
T'ng = 唐(hokkien)
Tan = 陈(hokkien)
Tang = 陈(teowchew), 邓
Tee = 郑
Teh = 郑(hokkien)
Tek
Teng = 唐(hokkien)
Teo = 张(hokkien)
Teoh = 张(hokkien)
Tern
Thang = 唐
Ting = 陈(hokchew)
Tong
Tung = 董
Wan = 范, 温
Wen = 温
Wong = 王 / 黄(cantonese)
Woon = 温
Yam
Yip = 叶
Yap = 叶
Yau
Yeoh = 杨