Elsie sits next to 3 phonetic neighbors — Elsa, Ellie, and Millie are the closest matches by sound. Most share Elsie's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is my oath"
"from Hadria"
"sun, sunshine"
"courageous, valiant"
"may Jehovah increase"
"son of Colin, victory of the people"
"fairy maiden"
"grace, eternal"
"star"
"wild boar meadow"
"One who lives near a brook"
"heavenly, of the sky"
"from 'Van' + 'Essa' (pet form of Esther)"
"son of Emery, brave and powerful"
"life, living"
"lion of God"
"trembling tree"
"bright, shining light"
"orange tree"
"heavenly sea, royal waters"
Similar sound: These names share phonetic patterns with Elsie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (via Scottish) origins, giving them the same cultural heritage as Elsie.
Rhythm: Elsie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.