Phonetic rendering of Spanish 'Don Juan' (DON-hwan):
唐 ('táng,' chosen because Tang dynasty connotes elegance and the 'don/táng' sound matches) +
璜 ('huáng,' a half-disc jade ornament, picked for the 'huan' sound). The Don Juan legend reaches Chinese audiences through Tirso de Molina's play, Mozart's opera 'Don Giovanni,' and Byron's epic poem — making
唐璜 the standard literary shorthand for an unrepentant womanizer.