Alyssia sits next to 4 phonetic neighbors — Alicia, Alyssa, and Alissa are the closest matches by sound. Most share Alyssia's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Noble kind; of noble nature (from adal + heid)"
"eternal blossom"
"halo, ring of divine light"
"valley, serene dale"
"stoneworker, mason"
"day's eye (the flower)"
"ruling family, succession of power"
"settlement of Paega (a personal name)"
"queen, wife of the khal"
"beloved, star of the sea (Mary) + famous warrior (Lou)"
"flowing river (associated meaning)"
"modern African-American created name combining Sha- prefix with -da..."
"nobility, illustrious"
"shining one"
"valiant, courageous"
"beautiful, flourishing"
"little thing (endearing diminutive)"
"pearl of wisdom"
"valley"
"oak tree (via Ayla)"
"son of Coinneach (child of Coinneach)"
Similar sound: These names share phonetic patterns with Alyssia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic (via Alice) origins, giving them the same cultural heritage as Alyssia.
Rhythm: Alyssia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.