Alethea sits next to 3 phonetic neighbors — Althea, Alethia, and Aletha are the closest matches by sound. Most share Alethea's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"truth"
"noble, nobility"
"graceful meadow"
"from India, land of the Indus"
"gift of God"
"innocent"
"whole, universal"
"sweetly speaking, well-spoken"
"song, joyful song"
"pure"
"well-spoken, of good repute"
"moon goddess (Polynesian)"
"raven meadow"
"honey"
"high tower"
"God is gracious"
"divine power (short for Oswald)"
"home of the gods"
"dark one"
"shining with glory"
"glory of the father (short form of Cleopatra)"
Similar sound: These names share phonetic patterns with Alethea — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Alethea.
Rhythm: Alethea is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.