One of the seven gates of heaven according to Islam. The gate is for people who fast during Ramadan.
Hence, reyyan is an Arabic word and it can be use as a girl's name in
muslim countries. Also, in Ottoman language "reyyan" means that " a person who satisfied with
water, someone who had enough
water"
In classical Turkish Literature, reyyan means that "someone who is drunk with the wine of (spiritual) love"