There are multiple origins and meanings for the name Rayana:
1. Arabic name (ريانة) [Rayanah] comes from the Arabic word (رَيّان) [rayan] meaning - "watered; full; juicy; abundant; fresh; rich; filled; full of". The female equivalent of the male name Rayan. Al Rayyan is the name of the door to heaven in Islam. Thus the name Ryana can be translated as - "girl who opens the door to paradise"
2. Form of the Arabic name Raya - "banner, flag"