Hyon sits next to 3 phonetic neighbors — Hyun, Hyeon, and Hyon are the closest matches by sound. Most share Hyon's Korean-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Virtuous, worthy, able"
"raging flow"
"God is gracious"
"sacred place, holy enclosure"
"a sense of the familiar"
"sun of the faith, sun of religion"
"the metal iron, element of strength and endurance"
"stream, rivulet, small river"
"champion, lord"
"coined American name; no classical etymology"
"modern invented name; possibly derived from Toronto place name"
"Branch; fern or bracken"
"light breeze, gentle wind"
"devoted to Demeter, goddess of harvest"
Similar sound: These names share phonetic patterns with Hyon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Korean origins, giving them the same cultural heritage as Hyon.
Rhythm: Hyon is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.