Mahamoth

• mammoth: an extinct form of elephant, feared by Stone Age men

• Mohammed: the Prophet of Islam

• Mahmoud: described by J. S. Atherton as "the Old Enemy ... the ancient figure of evil, against whom the Crusaders fought", though Atherton may be confusing this name with Mahound
  • J. S. Atherton, Islam and the Koran in Finnegans Wake
  • Wikipedia
• large (maha) moth