Adarius sits next to 4 phonetic neighbors — Darius, Adrian, and Adarian are the closest matches by sound. Most share Adarius's Old Persian via Darius-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"possessor of good"
"anointed one who carries"
"from Carlisle"
"from the open, beloved"
"X-ending creative coinage"
"son of Benjamin"
"thankful, God has heard"
"army man, soldier"
"from the hay valley"
"elaboration of Princeton, from Prince + ton"
"broad clearing, wide meadow"
"who is like God"
"like a big body of water"
"healer (if from Jason)"
"warner, one who cautions"
"Yahweh has bestowed"
"whole, powerful"
"modern creative variant of Jason"
"immense quantity, boundless"
"to be filled with wonder and admiration"
"handsome son"
Similar sound: These names share phonetic patterns with Adarius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Persian via Darius origins, giving them the same cultural heritage as Adarius.
Rhythm: Adarius is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.