Lenni sits next to 5 phonetic neighbors — Lenny, Benny, and Kenny are the closest matches by sound. Most share Lenni's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave lion, lion-strong"
"Water of life; the distilled spirit drink"
"to buy, to trade, merchant"
"clay hill settlement"
"place of destruction, the abyss"
"barley grain, of the barley field"
"rounded hill, trunk-shaped land"
Similar sound: These names share phonetic patterns with Lenni — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Lenni.
Rhythm: Lenni is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.