Emiko sits next to 4 phonetic neighbors — Amiko, Emiko, and Kimiko are the closest matches by sound. Most share Emiko's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beautiful as a painting, child"
"flowing stream"
"beautiful, graceful"
"beautiful and honest"
"friend"
"justice, correctness"
"peace"
"sword"
"cherry tree flower"
"carp fish; symbol of perseverance and good luck"
Similar sound: These names share phonetic patterns with Emiko — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Emiko.
Rhythm: Emiko is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.