Carlyle sits next to 4 phonetic neighbors — Carlisle, Carlin, and Carlo are the closest matches by sound. Most share Carlyle's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the fortified city"
"open lands, clearing"
"crossing, ford"
"natural/sky (possible Polynesian interpretation)"
"visionary, seer"
"God grants blessing to the sorrowful"
"chromium metal, lustrous strength"
"supplanter, one who follows closely"
"spring of water, water gift"
"eternal ruler, ever powerful"
"watchful, alert, awake"
"angelic warrior"
"dear, beloved"
"gift of God"
"young warrior"
"strength, power"
"settlement on the rock, homestead"
"God is exalted, gift of God"
"brave, courageous"
"holy, divine"
"creative compound name"
Similar sound: These names share phonetic patterns with Carlyle — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Welsh via English origins, giving them the same cultural heritage as Carlyle.
Rhythm: Carlyle is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.