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Proto-Italic *lakus

→ English cunette (derived)
→ Aragonese laco (inherited)
→ Asturian llagu (inherited)
→ Catalan llac (inherited)
→ Dalmatian lac (inherited)
→ Emilian lèg (inherited)
→ Spanish lago (inherited)
→ French lac (inherited)
→ Old French lac (derived)
→ Franco-Provençal lac (inherited)
→ Friulian lâc (inherited)
→ Galician lago (inherited)
→ Italian lago (inherited)
→ Latin lacus (inherited)
→ Latin lak (inherited(la/wa))
→ Norman lac (inherited)
→ Portuguese lago (inherited)
→ Romansch lag (inherited)
→ Romansch lai (inherited)
→ Romansch lej (inherited)
→ Romansch laitg (inherited)
→ Romanian lac (derived)
→ Aromanian lac (inherited)
→ Sicilian lacu (inherited)
→ Venetian lach (inherited)