Fuka sits next to 3 phonetic neighbors — Fuka, Huka, and Fuuka are the closest matches by sound. Most share Fuka's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Deep fragrance; profound scent"
"curiosity, inquisitiveness"
"without equal"
"azalea flower"
"freedom"
"grace, divine blessing"
"little she-goat"
"wide, broad"
"noble natured"
"fire, flame"
"life"
"knowing; wise"
"pearl"
"anointed one with grace"
"invented blend of valley + suffix"
"modern coinage, phonetic invention"
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"noble"
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Similar sound: These names share phonetic patterns with Fuka — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Fuka.
Rhythm: Fuka is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.