Proto-Indo-European *bʰlew-

→ Old French flum (derived)

→ Friulian flum (derived)

→ Italian fiume (inherited)

→ Latin fluor (derived)

→ Latin fluvius (derived)

→ Latvian blāvs (derived)

→ Romansch flum (derived)

→ Romansch flem (derived)

→ Romansch flüm (derived)