Lettie sits next to 3 phonetic neighbors — Betty, Netty, and Lottie are the closest matches by sound. Most share Lettie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"joy, happiness, gladness"
"warrior woman (modern interpretation)"
"from Quincy, France"
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"cart driver, transporter"
"vine, climbing plant"
"all, completely beautiful"
"pure"
"mighty in battle"
"gift, abundance"
"praised, she will be praised"
"quaking aspen tree"
"high meadow"
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"king's meadow"
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Similar sound: These names share phonetic patterns with Lettie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lettie.
Rhythm: Lettie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.