Leni sits next to 3 phonetic neighbors — Lena, Laney, and Eleni are the closest matches by sound. Most share Leni's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"light, bright, shining torch"
"honorable conduct"
"pure, chaste"
"elder tree island"
"equity, lawfulness"
"descendant of Cathasach"
"beloved, calm"
"rowan tree, protection"
"maiden, daughter"
"elf power"
"care, protection"
"purple gemstone"
"venerable, consecrated"
"taught by God"
"goddess of spring, month of May"
"bird"
"little king"
"precious gem, treasure"
"free woman"
"fiery, impetuous"
"a falling, descent"
Similar sound: These names share phonetic patterns with Leni — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Germanic Helena origins, giving them the same cultural heritage as Leni.
Rhythm: Leni is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.