German Meaning: The name Lorelei is a German baby name. In German the meaning of the name Lorelei is: Temptress'; A rocky cliff on the Rhine river dangerous to boat passage; the Lorelei whose singing lures men to destruction.American Meaning: The name Lorelei is an American baby name.In American the meaning of the name Lorelei is: Temptress'; A rocky cliff on the Rhine river dangerous to boat passage; the Lorelei whose singing lures men to destruction.erman Meaning: The name Lorelei is a German baby name. In German the meaning of the name Lorelei is: Temptress'; A rocky cliff on the Rhine river dangerous to boat passage; the Lorelei whose singing lures men to destruction. American Meaning: