Means alien. The Gnostic views their self as a spirit, thus they are alien to the world.

“Alien,” or how gnosis and everything spiritual is perceived by the uninitiated.

Means "alien" or of another race. The existence of spiritual force in the material realm is "alien" to it. This includes both aeons, such as the Logos, as well as the Gnostic him/her self. According to Dr. Gilles, Allogenes, is also a reference to Seth, the third son of Adam and Eve. In Jewish gnosis Seth is viewed as the Saviour". (Emeritus Professor Gilles Quispel who discovered the Gospel of Thomas.) "Allogenes" is a "Sethian" tractate, and is contained in Codex XI. 3, of the Nag Hammadi Lib.