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"
"grove of poplar trees, tree-lined avenue"
"king, chief"
"modern coinage with melodic -nell suffix"
"from Berlin; little shining one"
"lily flower, night"
"bold, to have courage"
"flowering, in bloom"
"brave, strong"
"sea of bitterness"
"brave and strong"
"joy, happiness"
"Blind; sixth; associated with Saint Cecilia, patron saint of musicians"
"Olive tree; peace; a variant of Olivia"
"genuine, true, perfect"
"river"
"oath"
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.