Hai (surname)
Hai is a Vietnamese surname. It is relatively uncommon compared to other Vietnamese surnames such as Nguyen, Tran, and Le. The meaning of the name is not definitively established but, like many Vietnamese surnames, is likely associated with a particular lineage, region, or historical event. Genealogical research within specific families bearing the Hai surname is typically necessary to determine their precise origins and any associated meanings. Distribution of individuals with the surname is primarily concentrated in Vietnam, with smaller populations residing in countries with significant Vietnamese diasporas, such as the United States, Australia, and Canada.