Lennon sits next to 4 phonetic neighbors — Lennan, Lenon, and Lennox are the closest matches by sound. Most share Lennon's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little cloak, beloved"
"king"
"good place"
"honest, steadfast"
"one who brings news"
"woodland"
"scholar"
"God the highest (variant interpretation)"
"king"
"panache, flair (as in 'cut a dash')"
"candle maker or seller"
"son of the firebrand (short for Tyson)"
"gray-haired one"
"sea warrior"
"gracious, dear"
"loved, beloved"
"glory of the land"
"laughter"
"messenger, herald"
"younger, the son"
"little warrior, young Mars"
Similar sound: These names share phonetic patterns with Lennon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Lennon.
Rhythm: Lennon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.