Eisuke sits next to 3 phonetic neighbors — Eisuke, Isuke, and Keisuke are the closest matches by sound. Most share Eisuke's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brilliant helper"
"from the place of goats, goat herder"
"Bright light, torch, shining one"
"God is gracious"
"dweller at the wood"
"equal, level, balanced"
"to help, to save, to rescue"
"land, road, prosperity"
"swan"
"gentle, humble"
"praised, praiseworthy"
Similar sound: These names share phonetic patterns with Eisuke — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Eisuke.
Rhythm: Eisuke is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.