Thais sits next to 5 phonetic neighbors — Thea, Thaïs, and Tais are the closest matches by sound. Most share Thais's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bandage, bond (Greek etymology)"
"unfortunate, unhappy"
"dawn, radiance"
"to admire, to marvel"
"she who lives"
"thanks, gratitude"
"peace"
"bright, clear (Clara) + beautiful (Belle)"
"noble, of noble kind (via Elizabeth)"
"transformed beauty, ceibo flower"
"bringer of light"
"dear rose"
"beloved of God, of the sea"
"noble, noble kind"
"Yahweh is gracious"
"feminine form of Simon"
"noble"
"from Arcy"
Similar sound: These names share phonetic patterns with Thais — 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 Thais.
Rhythm: Thais is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.