Cletus sits next to 3 phonetic neighbors — Clive, Curtis, and Titus are the closest matches by sound. Most share Cletus's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"called forth, gloriously summoned"
"he who follows at the heel; supplanter"
"small, little"
"gift"
"flat piece, thin layer"
"green, blooming"
"council friend"
"famous ruler"
"of noble birth"
"wealth, fortune, prosperity"
"bright fame"
"worthy of love"
"son of the horse lord"
"Honor"
"sun, moon"
Similar sound: These names share phonetic patterns with Cletus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Cletus.
Rhythm: Cletus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.