Dex sits next to 4 phonetic neighbors — Rex, Hex, and Max are the closest matches by sound. Most share Dex's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"right-handed, skillful"
"modern surname-style name"
"God has been gracious"
"brother (informal)"
"from the place of Einion"
"my messenger, my angel"
"symbol of resilience and mourning"
"top of the steep place"
"my father is peace"
"fire, flame"
"belonging to the Lord"
"shoemaker, cobbler"
"dark one"
"victory of the people"
"modern invented name"
"joyful, jovial (from the same root)"
"king, ruler"
"my covering is God; God protects"
"God is my light"
"modern blend of Jay + -ren"
"that which is yet to come"
Similar sound: These names share phonetic patterns with Dex — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Dex.
Rhythm: Dex is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.