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Ian can refer to:</onlyinclude> </noinclude>
- Ian (Fallout), a former Crimson Caravan guard and possible companion residing in Shady Sands in Fallout.
- Ian West, a resident of Arefu and a member of the Family in Fallout 3.
- IanWest.txt, dialogue for Ian West in Fallout 3.
- Ian (Nuka-World), a dead Nuka-World raider in the Nuka-World maintenance shed in the Fallout 4 add-on Nuka-World.
- Ian (Fallout 76), a resident of Orwell Orchards before the Great War, mentioned in Fallout 76.
- Real-life people:
- Ian Gregory, an actor who voiced Papa Khan in Fallout: New Vegas.
- Ian Rogers, a developer who worked at Obsidian Entertainment as a quality assurance tester on Fallout: New Vegas.
- Ian M. Anderson, a musician who worked with Brandracket and Bethesda Softworks as the music coordinator on Fallout 4.
- Ian Campbell, a developer who worked at ZeniMax Online Studios as an additional programmer on Fallout 76.
- Ian Olsen, a developer who worked at Bethesda Softworks as a character artist on Fallout 76.