Quan sits next to 4 phonetic neighbors — Juan, Kwan, and Khan are the closest matches by sound. Most share Quan's Chinese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"official, mandarin"
"son, born of"
"great one (from Korean Tae root)"
"gift of God"
"warrior, military companion"
"from the new estate"
"dark wood clearing"
"quiet warrior, silent fighter"
"son of Alexander (defender of men)"
"praised, thankful"
"devoted, pious"
"settlement by the brushwood"
"red-haired"
"God is gracious (via Sean/John)"
"Western cowboy hat, frontier spirit"
"son of the gray-haired one"
"summoner, one who calls forth"
"reputation, legacy"
"his name is God"
"symbol of wisdom and knowledge"
Similar sound: These names share phonetic patterns with Quan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sino-Vietnamese origins, giving them the same cultural heritage as Quan.
Rhythm: Quan is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.