Lenny sits next to 4 phonetic neighbors — Kenny, Benny, and Denny are the closest matches by sound. Most share Lenny's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave lion, lion-hearted"
"the Nubian, the southerner"
"emperor, supreme ruler"
"land of the Bronck family"
"short form of Kipling or Christopher"
"wealthy protector"
"earth"
"from the Roman family Terentius"
"battle, warrior"
"sculptor, craftsman"
"Macks settlement"
"noble elder"
"father of peace"
"winding river"
"uncertain, possibly Norse or Welsh origin"
"valley dweller, from the valley"
"resolute protector"
Similar sound: These names share phonetic patterns with Lenny — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic via Old English origins, giving them the same cultural heritage as Lenny.
Rhythm: Lenny is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.