Mell sits next to 4 phonetic neighbors — Mel, Bell, and Dell are the closest matches by sound. Most share Mell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"honey, sweet"
"sun, radiant light"
"elevated, lofty"
"meadow of the holly tree"
"moral principles, code of conduct"
"wanderer"
"western land, western meadow"
"river crossing dweller"
"all, completely"
"son of Jack, God is gracious"
"free man"
"a plaything, a source of joy"
Similar sound: These names share phonetic patterns with Mell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin mel / Welsh mêl origins, giving them the same cultural heritage as Mell.
Rhythm: Mell is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.