From the name of the ninth month of the Islamic calendar. It is derived from Arabic رمض (ramad) meaning "parchedness, scorchedness". Muslims traditionally fast during this month.
Rayan (Arabic: ريان‎‎) is a masculine given name of Arabic origin. A similar name, Rayyan (ريّان), is the name of one of Islam's Heaven gates through which only the observers of Ramadan would enter on the Day of Resurrection.