Theoria sits next to 3 phonetic neighbors — Thea, Victoria, and Theodora are the closest matches by sound. Most share Theoria's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"contemplation, beholding"
"beam of light"
"noble hill; Ella hill"
"pure"
"divine, goddess"
"free man"
"bright, shining light"
"deep, profound"
"bright fame"
"dark, rich"
"God is gracious"
"God is my light"
Similar sound: These names share phonetic patterns with Theoria — 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 Theoria.
Rhythm: Theoria is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.