Aizen sits next to 4 phonetic neighbors — Aiden, Jason, and Hazen are the closest matches by sound. Most share Aizen's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"love and goodness"
"of the raven, raven-like"
"acquired, possessed"
"uncertain, possibly Norse or Welsh origin"
"truly brave"
"from the city of lions"
"born of fire"
"gift of God"
"the promised land"
"wolf counsel"
"one who lives in a valley"
"modern invented name, energetic spirit"
"west wind"
"manly, brave, strong"
"descendant of the sea warrior"
"crooked mouth, wry-mouthed"
"new house"
"father of peace"
"cart maker, transporter"
"dark-complexioned son"
Similar sound: These names share phonetic patterns with Aizen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Aizen.
Rhythm: Aizen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.