- Nain , an Iran ian city.
- Nain , a village on the central coast of Labrador , part of the Canadian province of Newfoundland , sometimes also referred to as Natuk , its Inuit name.
- , based on the city of Nain , where it is mainly produced
- Náin , name of two fictional kings from Middle-earth , Náin I and Náin II
- Nain is surname of Jat Caste in India
- NAIN, Abbreviation for the North American Interfaith Network
- Nain, Welsh for Grandmother.
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