Theodor sits next to 3 phonetic neighbors — Theodore, Teodor, and Theo are the closest matches by sound. Most share Theodor's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"whole man, warrior"
"the very greatest"
"home ruler, lord of the estate"
"may He add another son"
"ruler of the world"
"yew bow warrior; archer"
"secret, mystery"
"mild, merciful"
"he judged, he governed"
"Yahweh has been gracious"
"peaceful ruler"
"bold counsel, brave advisor"
"ancestor descendant"
"glory-power"
"victory"
"wanderer"
"from, of (noble German particle)"
Similar sound: These names share phonetic patterns with Theodor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Theodor.
Rhythm: Theodor is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.