Cecil sits next to 3 phonetic neighbors — Cyril, Basil, and Percival are the closest matches by sound. Most share Cecil's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blind"
"lake dweller, from the lake"
"winding valley"
"beloved youngest son"
"guardian of riches"
"from Radley (red clearing)"
"bear"
"from India"
"dear, beloved (associated folk etymology)"
"short form of Kipling or Christopher"
"people's power"
"victory of the people"
"from the River Irvine"
"one who builds"
"occupational surname for cellar manager"
"follower of Dionysos, of Zeus"
"traveler of peace"
"little fire"
"mountain"
Similar sound: These names share phonetic patterns with Cecil — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Cecil.
Rhythm: Cecil is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.