Charm sits next to 4 phonetic neighbors — Carmen, Charmaine, and Harmony are the closest matches by sound. Most share Charm's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"song, chant"
"isle of apples"
"beautiful Mary"
"immortal, eternal"
"hair (related to French cheveux)"
"blessed joy, peaceful friend"
"the bright one"
"gracious, dear, beloved"
"from the Caecilius family"
"gladness, delight"
"free man (feminized)"
"royal clearing"
"Saint Anne"
"dew of the sea (rosemary herb)"
"to know, perceive"
"woman of the tribe"
"from the hollow, dweller in the hollow"
"fairy queen (via Titania)"
"God is gracious (Jane)"
"boundary meadow"
Similar sound: These names share phonetic patterns with Charm — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Charm.
Rhythm: Charm is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.