Ammon was the name of the Ordos Mentat in Dune II. He is described as a cunning Mentat who was in charge of the operations of House Ordos on Arrakis. In the manual for Dune 2000 it is mentioned that he was executed on the alleged charge of embezzlement.
Ammon is a white male with brown hair.
Dune 2000 - Mentioned in manual