Amun ( also spelled Amon , Amoun , Amen , and rarely Imen , Greek Î ` Î 1\/4 Î 1\/4 Î Î 1\/2 Ammon , and Î Î 1\/4 Î 1\/4 Î Î 1\/2 Hammon , Egyptian Yamanu ) was the name of a deity , in Egyptian mythology , who became one of the most important deities in Ancient Egypt . Amun , reconstructed Egyptian YamÄ nu ( also spelled Amon , Amoun , Amen , and rarely Imen or Yamun , Greek á 1\/4 Î 1\/4 Î 1\/4 Ï Î 1\/2 Ammon , and á 1\/4 Î 1\/4 Î 1\/4 Ï Î 1\/2 Hammon ) , was a god in Egyptian mythology who in the form of Amun-Ra became the focus of the most complex system of theology in Ancient Egypt .