Lexeme: auon, auoun, auonn
- Romanised orthography:
- auon, auoun, auonn
- Phonetic:
- ˈaːvon
Notes: Attested twice in the Catholicon (1499). Under the headword Auonn an iffern (avon an ifern) with the French translation 'fleuue denfer' (fleuve d'enfer, river of hell). Under the headword fluaff, auonn is given as equivalent of Latin fluvius, French fleuve.