Cleonymia yvanii is a moth of the Noctuidae family. It is found in Portugal, north-eastern Spain, southern France and north-eastern Italy. The wingspan is 18–25 mm. Adults are variable in colour, ranging from ochre to greyish-brown. Adults are on wing from the end of April to mid July in one generation per year. The larvae feed on Helianthemum species. They can be found in late summer. The species overwinters in the pupal stage.