Theodosia sits next to 4 phonetic neighbors — Theodora, Anastasia, and Dorothea are the closest matches by sound. Most share Theodosia's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"son of the steward"
"grace of the earth-worker"
"son of Matthew; gift of God"
"fair, white, blessed"
"beam of light"
"dark, black"
"creative variant of Katalina"
"rose flower, beauty"
"joy, happiness"
"industrious, hardworking"
"little thing (endearing diminutive)"
"bright, handsome"
"springtime, vernal"
"son of the right hand (via Benjamin)"
"son of Coinneach (child of Coinneach)"
"daughter of Briseus"
"heroine, one who defends"
"date palm tree"
"treatment, antidote"
"helpful, descendant of the helpful one"
Similar sound: These names share phonetic patterns with Theodosia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek 'theos' + 'dosis' origins, giving them the same cultural heritage as Theodosia.
Rhythm: Theodosia is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.