Arillia sits next to 4 phonetic neighbors — Aurelia, Ariel, and Amelia are the closest matches by sound. Most share Arillia's English-origin cluster, so the rhythm and vowel shape carry across the list.
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"golden"
"beloved, wished-for child"
"divine, heavenly"
"grace"
"sweet"
"brilliance, radiance, splendor"
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"creative American elaboration of Rhonda"
"eagle nobility"
"life (alternative Hebrew etymology)"
"noble, the bright one"
"song of joy"
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"free one"
"beginning, origin, creation"
Similar sound: These names share phonetic patterns with Arillia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin aureus via Aurelia origins, giving them the same cultural heritage as Arillia.
Rhythm: Arillia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.