Scarlett sits next to 4 phonetic neighbors — Charlotte, Starlet, and Violet are the closest matches by sound. Most share Scarlett's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright red color"
"divine, celestial"
"rye clearing, from Old English ryge leah"
"from Siena, Italy"
"lion of God"
"pearl"
"noble, nobility, of noble kind"
"just, righteous"
"bright, shining one"
"praise the Lord, variant of Hallelujah"
"the paisley pattern, ornate beauty"
"the sea"
"fidelity, friendship (symbolic)"
"princess, noblewoman"
"noble and tender"
"may Jehovah increase"
"work-power, powerful ruler"
"sea of bitterness"
"strong, brave, manly"
"rainbow"
Similar sound: These names share phonetic patterns with Scarlett — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French escarlate origins, giving them the same cultural heritage as Scarlett.
Rhythm: Scarlett is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.