Dain is a surname, and may refer to:Alphonse Dain (1896β1964), French Hellenist Claudia Dain, American author of romance novels Guy Dain (1870β1966), British physician Jack Dain (1912β2003), BritishβAustralian Anglican bishop Killian Dain, Irish wrestler Mungau Dain (1994β2019), ni-Vanuatu actor and villager Ralph Dain (1862β?), English footballer