Last name origins & meanings:
- Chinese: there are two sources of this surname,
both from the Spring and Autumn period (722–481 bc). At one
time, there existed a state of Dai at one time (in modern Henan
province). When this was defeated by the state of Cheng, residents of
the defeated state adopted Dai as their surname. Additionally, a duke
of the state of Song was called Dai, and his descendants adopted Dai
as their surname.
- Vietnamese: unexplained.
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