Ikeya sits next to 5 phonetic neighbors — Akira, Miya, and Kiara are the closest matches by sound. Most share Ikeya's Japanese cluster, so the rhythm and vowel shape carry across the list.
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Similar sound: These names share phonetic patterns with Ikeya — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese (池谷) origins, giving them the same cultural heritage as Ikeya.
Rhythm: Ikeya is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.