Kelsie sits next to 4 phonetic neighbors — Kelsey, Chelsea, and Elsie are the closest matches by sound. Most share Kelsie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ship's victory"
"best, excellent"
"devoted to God"
"beautiful meadow (speculative Celtic-influenced interpretation)"
"to worship, to cherish"
"sky blue, azure color"
"ancestor's descendant"
"Life, living"
"little rose, dear rose"
"brightness, radiance"
"divine, heavenly"
"whole, all-encompassing (Ella) + month of May/spring (Mae)"
"blend of Jay + -leen, phonetic Americanized name"
"beautiful to behold"
"defender of the people"
"approval, acceptance"
"fragrant bark"
"high, elevated place"
"evergreen; immortality"
"Ash tree settlement"
"small sheltered bay or inlet"
Similar sound: These names share phonetic patterns with Kelsie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English Ceol + sige origins, giving them the same cultural heritage as Kelsie.
Rhythm: Kelsie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.