Eizen sits next to 4 phonetic neighbors — Eisen, Aizen, and Eyzen are the closest matches by sound. Most share Eizen's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Iron; the metal symbolizing strength and endurance"
"dove"
"Innocent one"
"red-haired, ruddy complexion"
"grace, kindness"
"one who lays tiles"
"healer"
"Bird-like, of or relating to birds"
"just, righteous"
"road by the waterfall"
"of the forest, from the wood"
"little bear, dear bear"
"large homestead, settlement"
"emblem of the sacred bull"
"kingly power"
"strong decision-maker"
"dark one, dark-complexioned"
"triumph, winning"
"mountain village; reason of the mountains (Japanese interpretation)"
"the righteous one"
Similar sound: These names share phonetic patterns with Eizen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have German origins, giving them the same cultural heritage as Eizen.
Rhythm: Eizen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.