Theon sits next to 4 phonetic neighbors — Leon, Deon, and Theron are the closest matches by sound. Most share Theon's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"godly, divine"
"talent, ability, brilliance"
"varies by given names the initials represent"
"from Luca, of the light"
"goddess of night"
"son of Ben"
"from the Muscogee (Creek) Nation"
"modern invented name variant"
"God is gracious, Yahweh is gracious"
"kermes-dyed, rich red"
"constructed blend name"
"first of the month, calends"
"slender"
"wise ruler, ruler's advisor"
"gracious, merciful"
"one who strides, walks with purpose"
"place of the elms"
"most beautiful"
"gift of God"
"beautiful mountain"
"from the rye meadow"
Similar sound: These names share phonetic patterns with Theon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Theon.
Rhythm: Theon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.