Rayhana or Reyhana (Arabic:رَيْحَانَة rayḥānah), also spelt Rayhaana, Reyhaana, Rihana, Rihaana, is an Arabic female given name meaning the herb plant basil.

However, the name may possibly derived from the noun rā’iḥāh (رائِحَة) meaning "scent, aroma, smell, odor" or "fragrance or perfume" or "zest of a fruit peel".

Rayhana bint Zayd, one of the wives of Muhammad, was Jewish.

The Welsh name is derived from the common female name Rhiannon, meaning great queen and most associated with Rhiannon, a goddess of fertility, prominent in Welsh texts such as the Mabinogi.

It has gained popularity outside of Wales through its use in the song "Rhiannon" by Fleetwood Mac.