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"
"settlement on a road"
"elf ruler"
"sea bird"
"variant of Seer (prophet, visionary)"
"from the western meadow or clearing"
"hello (informal greeting association)"
"song, joy"
"from the broken land clearing"
"son of Hudd"
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.