Aeko sits next to 3 phonetic neighbors — Aiko, Echo, and Keiko are the closest matches by sound. Most share Aeko's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved child, love child"
"son of Hugh"
"noble ruler"
"from the western meadow or clearing"
"song, joy"
"place name associated with beech groves or rocky terrain"
"variant of Cyrus (sun, throne)"
"settlement on a road"
"sea bird"
"from the broken land clearing"
Similar sound: These names share phonetic patterns with Aeko — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Aeko.
Rhythm: Aeko is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.