Kayhan sits next to 4 phonetic neighbors — Kian, Kehan, and Kaylan are the closest matches by sound. Most share Kayhan's Persian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"universe, world, cosmos"
"the commander, the leader"
"yew tree"
"gnosis, spiritual knowledge"
"steadfast, unwavering"
"moon-cheerful"
"boon companion, confidant"
"being, existence"
"the Lord is my God"
"baby of the houbara bustard"
"maiden, virgin"
"one who guides to the right path"
"moonlit ruler, bright as the moon"
"noble by birth (archaic)"
"the pure, the selected"
"emperor, supreme ruler"
"God, the divine"
Similar sound: These names share phonetic patterns with Kayhan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Persian origins, giving them the same cultural heritage as Kayhan.
Rhythm: Kayhan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.