Theodore sits next to 3 phonetic neighbors — Thaddeus, Dorian, and Theodoric are the closest matches by sound. Most share Theodore's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"divine gift"
"barrel maker"
"farmer, earthworker"
"anointed one"
"unbranded cattle (etymological origin)"
"strife, quarrel"
"son of the steward"
"protector of humanity"
"mounted warrior, horseman"
"savior"
"bear, bear-like strength"
"truth, from Hebrew Emmet meaning truth or faithfulness"
"From the Aramaic 'Toma', meaning twin; borne by the Apostle Thomas"
"He will laugh; laughter"
"from Hadria, of the Adriatic"
"little king; descendant of the king"
"home ruler, estate ruler"
"gift of God; Yahweh has given"
"east town"
"fortunate, prosperous"
"beloved, darling"
Similar sound: These names share phonetic patterns with Theodore — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Theodore.
Rhythm: Theodore is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.