Thelia sits next to 5 phonetic neighbors — Thea, Cordelia, and Celia are the closest matches by sound. Most share Thelia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flowering, in bloom"
"yew warrior"
"gladness, delight"
"fame, reputation"
"modern coinage with melodic -nell suffix"
"bright, shining (via Bertha root)"
"flowering, in bloom"
"brave, strong"
"God is gracious"
"she who maintains possessions"
"brave and strong"
"sea of bitterness"
"shaded promenade"
"forest dweller"
"oath"
"twin"
"lily flower, night"
"genuine, true, perfect"
Similar sound: These names share phonetic patterns with Thelia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Thelia.
Rhythm: Thelia is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.