Letti sits next to 4 phonetic neighbors — Letty, Betty, and Netti are the closest matches by sound. Most share Letti's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"joy, happiness, gladness"
"variant of Haley (hay meadow)"
"feminine form of Carl/Charles"
"dew of God"
"royalty, chief"
"peaceful relations"
"life"
"the natural world, innate character"
"oath of God"
"bright, radiant (via Irish Niamh)"
"pearl"
"modern invented name"
"gentle horse, tender"
"belonging to the night"
"dawn, bright star"
"star, stars"
"bearer of good news"
"forest dweller"
"Yahweh is merciful"
"noble clearing"
"slender, fair"
Similar sound: These names share phonetic patterns with Letti — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Letti.
Rhythm: Letti is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.