Occitan tron

← Catalan tro (cognate)

← Spanish trueno (cognate)

← Ancient Greek τόνος (derived)

← Latin tonus (inherited)

← Latin (mention)

← Latin tonitrus (mention)

← Old Occitan (inherited)

← Portuguese trom (cognate)

→ Catalan tro (cognate)

→ Spanish trueno (cognate)

→ Portuguese trom (cognate)

→ Sicilian tronu (mention)