Kairys
{{Lithuanian family name|m=Kairys|fm=Kairienė|fu=Kairytė|origin=literally:"leftie"}}
Kairys is a Lithuanian language family name.
The surname may refer to:
- Jurgis Kairys (1952, Lithuanian aerobatic pilot and aeronautical engineer
- David Kairys (born 1943), American professor of Law
- Steponas Kairys, Lithuanian engineer and politician
- Donaldas Kairys, Lithuanian basketball player
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