Cleo sits next to 4 phonetic neighbors — Clio, Leo, and Theo are the closest matches by sound. Most share Cleo's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"glory, fame"
"lily flower, purity"
"strong, manly, brave"
"gracious judge"
"to warn, admonish"
"wise, knowing"
"one who works the earth"
"great lord, magnificent ruler"
"flowing, streaming"
"fair, smooth, white wave"
"precious gemstone"
"eagle"
"white shoulder (from Fionnuala)"
"son of Finlay (surname origin)"
"bright, shining light"
"oath of God"
"lily flower"
"noble, princess"
"of the Tatius family"
"honor, victory"
"son of the fair warrior"
Similar sound: These names share phonetic patterns with Cleo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Cleo.
Rhythm: Cleo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.