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"
"Bright fame; from Germanic elements hrod (fame) and possibly relate..."
"little Dorrit (literary nickname)"
"hunter (possible Greek derivation from Theron)"
"noble, exalted"
"short form of Valerie or Valentina"
"famous one"
"of the stars, star-like"
"will, desire + helmet, protection"
"noble friend"
"descendant of the dark stranger"
"twin"
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.