Gudgeon is the surname of a wizarding family. It is unknown if they are pure-blood, or if they have both Muggle and magical heritage.
- Davey Gudgeon – a student at Hogwarts in the 1970s
- Galvin Gudgeon – a Seeker for the Chudley Cannons
- Gladys Gudgeon – a loyal fan of Gilderoy Lockhart
Gudgeon is a common name for several kinds of small freshwater fish. The word derives from the Old French goujon, which ultimately comes from the Latin gobius, "goby." "Gudgeon" is also an English slang term for a gullible person.