Apollonia sits next to 4 phonetic neighbors — Apolline, Apollina, and Polonia are the closest matches by sound. Most share Apollonia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Of Apollo; belonging to Apollo"
"festival of roses"
"wise"
"Noble kind"
"Where is the prince? Not exalted"
"shining, radiant"
"of Sicily, the triangular island"
"heavenly (folk reinterpretation)"
"God is with us"
"from Venice, the Venetian city"
"Resurrection, rising again"
"joyful, playful"
"festival of roses"
"stranger, foreigner"
"defender of mankind"
"pure, clear"
"famous wolf"
"of the navy, deep blue sea"
"consecrated to God"
"life (from Zoe) with feminine diminutive"
"refreshed, satisfied"
Similar sound: These names share phonetic patterns with Apollonia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek — feminine form of Apollonios origins, giving them the same cultural heritage as Apollonia.
Rhythm: Apollonia is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.