French word lampion comes from Italian lampa (Lamp. Light.), Italian -one

Detailed word origin of lampion

Dictionary entry	Language	Definition
lampa	Italian (ita)	Lamp. Light.
-one	Italian (ita)	An augmentative suffix, used to indicate largeness or importance. (organic chemistry) ketone. (physics) -on (particle).
lampione	Italian (ita)	Streetlight, streetlamp, lamppost.
lampion	French (fra)	Chinese lantern.

Words with the same origin as lampion