Karol sits next to 4 phonetic neighbors — Carol, Carole, and Karen are the closest matches by sound. Most share Karol's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"free man"
"of the sun, solar"
"to love, to wish (proto-Indo-European root of Veneti)"
"silver"
"industrious, hardworking"
"fairest, loveliest"
"youthful, belonging to Julius"
"patient, steadfast"
"heavenly, of the sky"
"angel, divine messenger"
"mighty in battle"
"universal strength"
"grace, favor"
"gracious, beautiful"
"consecrated to God"
"victory bearer"
"feminine form of Leander (lion man)"
"consecrated to God"
"grace, favor"
"beloved beautiful one"
Similar sound: These names share phonetic patterns with Karol — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic via Slavic origins, giving them the same cultural heritage as Karol.
Rhythm: Karol is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.