Rising sun or forgiver
Kaiyan is a name with multiple potential roots, most notably found in Persian and Sanskrit contexts. In Persian, it is often associated with the 'Kayanian' dynasty of semi-mythological kings, while in Sanskrit it can be interpreted as 'rising sun' or 'forgiver'.
Less common today
Kaiyan isn't in the latest US Top 1000. It last peaked at #4,124 in 2012.
US births per 5-year period, 1990βpresent (SSA data).