What is "rhain"

Rhain or Rhein may refer to:

• Rhain ap Cadwgan or Cloten (fl. 8th century), King of Dyfed and Brycheiniog
• Rhain ap Maredudd (died c. 808), king of Rhainwg (Dyfed)
• Rhain the Irishman (Rhain Yscot) (fl. 11th-century), Irish pretender who held Dyfed

• German name of the town of Brežice and Brežice Castle (Schloss Rhain)