Elsi sits next to 5 phonetic neighbors — Elsie, Elsa, and Elsey are the closest matches by sound. Most share Elsi's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my God is abundance or my God is an oath"
"protector"
"who is like God"
"western lake"
"gracious, full of grace"
"compound of grace and flower"
"Emerald (folk etymology)"
"dawn, daybreak"
"ugly head (literal Old Irish)"
"serene, calm, clear"
"member of the Gauts tribe"
"friend, beloved"
"olive tree, peace"
"free woman"
"pale, fair complexioned"
"turbulent, like a storm"
"famous wolf"
"the other Aenor (Aliénor)"
"son of Matthew, gift of God"
"woman from France"
"from Doris, sea nymph"
Similar sound: These names share phonetic patterns with Elsi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Elsi.
Rhythm: Elsi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.