Catalan lluna

← Proto-Indo-European *lówksneh₂ (inherited)

← Proto-Indo-European *lewk- (mention)

← Old Latin losna (inherited)

← Proto-Italic *louksnā (inherited)

← Latin lūna (inherited)

← Old Occitan luna (inherited)

→ Spanish luna (cognate)

→ French lune (cognate)

→ Portuguese lua (cognate)