Elsie sits next to 4 phonetic neighbors — Elsa, Elsie, and Alec are the closest matches by sound. Most share Elsie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledged to God"
"bell ringer"
"Yahweh saves"
"slender; narrow passage"
"modern American coinage; possibly echoing Lateran (the Roman hill)"
"Exclamation of triumphant discovery"
"farm garden, upper estate enclosure"
"merciful, gracious"
"Noble, patrician (via Patrick)"
"writer, creator of works"
"home ruler"
"dwelling place"
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 Elizabeth) 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.