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"
"descendant of Cathasach"
"handsome, beloved"
"devoted to the Virgin Mary (Panagia)"
"son of Lawrence"
"son of Rawlin, son of Ralph"
"young lion, lion cub"
"pledge, oath"
"from Airelle (place in Normandy, France)"
"Athenian, of Attic culture"
"benevolent king"
"noble friend, old friend"
"holy settlement"
"grace, kindness"
"people's conqueror"
"God's friend"
"ray of light, particle of radiance"
"strong, powerful"
"vigor, intensity"
"long-lived, one who rests"
"prince, leader"
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.