Elsa sits next to 4 phonetic neighbors — Else, Elsa, and Ella are the closest matches by sound. Most share Elsa's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledged to God"
"beautiful, pretty"
"open plain"
"youthful, belonging to the Julian family"
"pearl"
"sea"
"God is gracious"
"pure, holy"
"life"
"fertile place, place of abundant water"
"from Hadria (near the Adriatic)"
"moon goddess"
"flowing, like a stream"
"peaceful, safe"
"sun"
"wished-for child"
"grace, favor"
"goddess of fate and weaving"
"olive"
"coal town"
"summer"
Similar sound: These names share phonetic patterns with Elsa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic/Hebrew origins, giving them the same cultural heritage as Elsa.
Rhythm: Elsa is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.