Theia sits next to 4 phonetic neighbors — Thea, Rhea, and Leah are the closest matches by sound. Most share Theia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"goddess, divine"
"wind, gust"
"prosperous in war"
"gods will, divine wonder"
"strong, virtuous, honorable"
"Jewish woman (via Judith/Yehudit)"
"fairy palace, fairy mound"
"happiness, fortune"
"sweet basil"
"free woman, strong woman"
"my God is abundance"
"sunny, full of sunshine"
"lake, pool"
"pearl"
"noble, nobility"
"beautiful, noble"
"graceful, beautiful"
"high tower"
"home ruler (as short for Harriet/Henrietta)"
"beloved"
"sky blue"
Similar sound: These names share phonetic patterns with Theia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek origins, giving them the same cultural heritage as Theia.
Rhythm: Theia is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.