Carroll sits next to 4 phonetic neighbors — Carol, Carole, and Carolyn are the closest matches by sound. Most share Carroll's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"champion"
"of Rome, Roman woman"
"mercy, clemency"
"luminous, shining (via Lucinda)"
"bright like a bear"
"battle horn"
"midsummer, summer solstice"
"variant of Chloris, goddess of flowers"
"from Leicester; possibly heavenly"
"wonderful, to be admired"
"prosperous friend"
"the white, noble one"
"numbness, the narcissus plant"
"shepherd, friend"
"washed, cleansed; or variant of Lavinia"
Similar sound: These names share phonetic patterns with Carroll — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Carroll.
Rhythm: Carroll is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.