Elysia sits next to 4 phonetic neighbors — Alicia, Alessia, and Alysia are the closest matches by sound. Most share Elysia's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blissful, from Elysium"
"tree, oak tree"
"he who holds firm to good"
"little hound, little dog"
"of noble kind"
"beam of light"
"palm tree"
"pure"
"a history, a recounting (archaic)"
"sun, bright"
"calm waters, serenity"
"unconquerable, invincible"
"immortal, eternal"
"sea (via Kai)"
"miracle of God"
"everything is all right; peaceful harmony"
"fragrant white flower"
"dear, beloved"
"brilliant, radiant, luminous"
"of the heavens"
Similar sound: These names share phonetic patterns with Elysia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Greek origins, giving them the same cultural heritage as Elysia.
Rhythm: Elysia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.