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"
"moon-cheerful"
"emperor, supreme ruler"
"one who guides to the right path"
"pure, chaste"
"good, benevolent"
"elder brother, wise child"
"divine splendor"
"universe, cosmos"
"divine, worthy of worship"
"steadfast, unwavering"
"one who learns, student"
"son of a king, prince"
"free, liberated, independent"
"moonlit ruler, bright as the moon"
"the Lord is my God"
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.