Elverta sits next to 4 phonetic neighbors — Alberta, Elvira, and Roberta are the closest matches by sound. Most share Elverta's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"truly supernatural; elf-true"
"noble friend"
"hunter (possible Greek derivation from Theron)"
"little Dorrit (literary nickname)"
"excellent, outstanding"
"twin"
"noble, exalted"
"resolute protector"
"Bright fame; from Germanic elements hrod (fame) and possibly relate..."
"bright, shining"
"short form of Valerie or Valentina"
"descendant of the dark stranger"
Similar sound: These names share phonetic patterns with Elverta — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Germanic origins, giving them the same cultural heritage as Elverta.
Rhythm: Elverta is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.