Lennie sits next to 5 phonetic neighbors — Lenny, Ellie, and Penny are the closest matches by sound. Most share Lennie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave lion"
"from Britain, a Briton"
"graceful, beautiful"
"bailiff, steward, administrator"
"beautiful, radiant as a dove"
"pure"
"precious, of highest value"
"gift from God"
"pure, slender"
"bright, radiant (via Irish Niamh)"
"hill, hillfort"
"golden, of gold"
"torch, bright one"
"divine understanding"
"peace, wishes"
"victorious people"
"meadow clearing"
"pure"
"vine, climbing plant"
"from the land of the long hill"
"terebinth tree"
Similar sound: These names share phonetic patterns with Lennie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Lennie.
Rhythm: Lennie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.