Molly sits next to 4 phonetic neighbors — Polly, Holly, and Dolly are the closest matches by sound. Most share Molly's English-origin cluster, so the rhythm and vowel shape carry across the list.
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"star of the sea"
"life, living"
"gentle strength; industrious"
"free man, feminine form of Charles"
"eighth"
"illusion, magic"
"truth, genuine"
"light"
"fortress on the river (possible Celtic root)"
"free man, strong"
"foreign, the other"
"night; dark beauty"
"island"
"fidelity, eternity, resilience"
"strong, brave, manly"
"diminutive of Sarah"
"Christmas, born at Christmas"
"young green plant, fresh growth of spring"
"ivory white"
"Aryan, noble people"
"flowing body of water"
Similar sound: These names share phonetic patterns with Molly — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Latin origins, giving them the same cultural heritage as Molly.
Rhythm: Molly is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.