- 1865-1939; U.S. surgeon
- 1861-1939; U.S. surgeon; brother of Charles Horace
county in W Ireland, in Connacht province: 2,084 sq mi (5,398 sq km)
- (short f) mayonnaise
- Pass me the mayo please.
- A county in the Republic of Ireland.
- A village in Yukon Territory, Canada