The name "Ilysse" is the phonetic spelling of "Elysse," a variant of the name "Elise." The first syllable of Ilysse is pronounced as the long "i" sound, represented as /aɪ/ in the IPA phonetic transcription. The second syllable is pronounced as the schwa sound, /ə/. The final syllable is pronounced as the soft "s" sound, /s/. While not a traditional spelling, it is a unique and modern take on a classic name.