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"
"a sense of the familiar"
"sacred place, holy enclosure"
"coined American name; no classical etymology"
"Branch; fern or bracken"
"the metal iron, element of strength and endurance"
"devoted to Demeter, goddess of harvest"
"dweller by the Rhine river"
"angel, divine messenger"
"champion, lord"
"modern invented name; possibly derived from Toronto place name"
"God is gracious"
"stream, rivulet, small river"
"sun of the faith, sun of religion"
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.