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"
"modern creative variant of Jason"
"pasture in a marsh"
"always ruler"
"war, strife"
"large town, community"
"from the place of the sturgeon"
"bearer of Christ"
"rye clearing"
"natural/sky (possible Polynesian interpretation)"
"light"
"bold undertaking; risky journey"
"peace-giver, one who pacifies"
"valley settlement"
"son of the brave, warrior"
"who is like God"
"like a big body of water"
"elaboration of Princeton, from Prince + ton"
"rich, wealthy"
"from the castle town"
"settlement by ash trees"
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.