Save Gender Masculine & Feminine Usage Astronomy Pronounced Pron. /əl.ˈreɪ.iː/ [key·simplify] Other Forms FormsErrai Meaning & History Gamma Cephei is a binary star system in the constellation Cepheus. The system bore a traditional name variously spelled as Errai, Er Rai or Alrai, deriving from the Arabic الراعي (ar-rā‘ī), meaning "the shepherd".