Damarius sits next to 3 phonetic neighbors — Darius, Damian, and Marcus are the closest matches by sound. Most share Damarius's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gentle, tame"
"middleman, arbitrator"
"strong flow, powerful surge (river etymology)"
"from Airelle (place in Normandy, France)"
"the wind, breath of life"
"new house"
"symbol of wisdom and knowledge"
"life, living"
"to gain, to win, to cultivate"
"modern invented name"
"something deserved, virtue"
"brother, friend"
"victory of the people (through Nicholas derivation)"
"beautiful in character"
"purple-red, royal color"
"from Brittany, land of the Britons"
"of/from Sean — modern American creation"
"great, exalted (via Kabir influence)"
"invented modern name"
"helper, one who assists"
"helper, protector"
Similar sound: These names share phonetic patterns with Damarius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Damarius.
Rhythm: Damarius is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.