
Banker in Dune: The Graphic Novel, Book 1: Dune
An unnamed Agent of the Guild Bank took part in the Banquet House Atreides had arranged for the Houses Minor of Arrakis.Lady Jessica detected his subtly hidden language pattern was that of Giedi Prime and conjected that he was an Agent of House Harkonnen.
Dune CCG:[]

Cesar "La" Layre as depicted in the Dune CCG
The Dune CCG names the Guild Bank president of Arrakis as "Cesar Layre", nicknamed "La" by his peers.