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"
"peace settlement"
"little Hugh"
"marshland meadow"
"symbol of resilience and mourning"
"new settlement"
"from Arcy (place name)"
"small stream, narrow inlet"
"who is like God"
"follower of Christ, Christian"
"talent, ability, brilliance"
"rye land, land of rye fields"
"son of David, son of the beloved"
"lyric poetry, song set to the lyre"
"bright fame"
"first of the month, calends"
"warlike, martial"
"grove, wooded area"
"God is my light"
"peaceful, tranquil"
"child born at a prosperous time"
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.