Cecilio sits next to 4 phonetic neighbors — Cecilia, Basilio, and Emilio are the closest matches by sound. Most share Cecilio's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blind"
"lion-man, brave as a lion"
"God is with us"
"victor's crown"
"king + world (folk etymology)"
"calf, young animal"
"one who serves, preserver"
"from the place Taveiro"
"kingly, of royal bearing"
"God will strengthen, strengthened by God"
"bright fame"
"treasure of God"
"wealth, fortune, prosperity"
"gift of God, godlike"
"light, splendor, radiance"
"protector of men"
"of the Vergili clan"
"hand of God"
Similar sound: These names share phonetic patterns with Cecilio — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Cecilio.
Rhythm: Cecilio is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.