Catalan tro

← Catalan to (doublet)

← Spanish trueno (cognate)

← Ancient Greek τόνος (derived)

← Latin tonus (inherited)

← Latin (mention)

← Latin tonitrus (mention)

← Occitan tron (cognate)

← Old Occitan (inherited)

← Portuguese trom (cognate)

→ Catalan to (doublet)

→ Dalmatian tun (cognate)

→ Occitan tron (cognate)

→ Portuguese trom (cognate)

→ Sicilian tronu (mention)