Theodoros sits next to 4 phonetic neighbors — Theodore, Theodor, and Theodoros are the closest matches by sound. Most share Theodoros's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God"
"of the earth mother"
"to set, to place, to establish"
"from Sebastos (venerable city)"
"God is gracious"
"of the earth"
"gift of God"
"king, ruler"
"victory of the people"
"stone marker, boundary"
"the unseen"
"third"
"earth mother follower"
"of the gods"
Similar sound: These names share phonetic patterns with Theodoros — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Theodoros.
Rhythm: Theodoros is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.