Cylo sits next to 4 phonetic neighbors — Milo, Arlo, and Kilo are the closest matches by sound. Most share Cylo's Modern/Persian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"modern invented name, possibly sun"
"little ruler"
"Settlement near a rift or cleft in the land; from Old English rif (..."
"a magical charm or spell; also a curse"
"one who illuminates"
"Inspired by the Japanese Kaizen philosophy meaning 'continuous impr..."
"modern invented name combining elements of strength and wisdom"
"outlaw, one who has been banned"
"Water of life; the distilled spirit drink"
"From the city of Seville in southern Spain"
Similar sound: These names share phonetic patterns with Cylo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Modern/Persian origins, giving them the same cultural heritage as Cylo.
Rhythm: Cylo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.