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"
"wild rose, thorny shrub"
"plow blade maker or user"
"throne, master"
"work and power combined"
"younger, the son"
"flower (from Greek anthos)"
"source of joy"
"from the city of Dax"
"mind, intellect, spirit"
"merciful, gentle"
"world-mighty"
"lion hardy"
"place of hawks, kite's settlement"
"beam of light"
"one who cuts cloth, tailor"
"king"
"stone worker (via Mason)"
"slender"
"variant of Carson"
"wealthy guardian"
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.