Carolyn sits next to 3 phonetic neighbors — Caroline, Carol, and Carolina are the closest matches by sound. Most share Carolyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"free woman"
"nobility, aristocracy"
"jewel of the sea"
"youthful (from Julia)"
"home on the wooded hill"
"gift of the goddess"
"moon"
"heavenly, sky (Polynesian element lani)"
"oak tree, oak grove"
"God's gift of grace"
"real, authentic, not false"
"song thrush (a songbird)"
"my God is abundance"
"brave as a bear"
"eternal blossom"
"oak tree, strength"
"dark, black"
"Yahweh has shown favor"
"bitter sea, wished-for child"
"jasmine flower"
"youthful goddess, keeper of immortality"
Similar sound: These names share phonetic patterns with Carolyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Carolyn.
Rhythm: Carolyn is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.