Vietnamese: unexplained.
GIVEN NAMES: Vietnamese 55%; Chinese 16%. Mui (6), Bau (3), Cong (3), Minh (3), Phi (3), Lan (2), That (2), Binh, Cuong, Denh, Duong, Henh; Sang (3), Man (2), Tong (2), Chan, Hang, In, Kiu, Lai, Leng, Sin, Siu, Song.
See the Key to the Dictionary or consult the General Introduction for further explanation.