That Agamemnon from Dune was the original Greek one. But then, with all the descendants through various families since the ancient greek, it would be a fairly long shot NOT to have Agamemnon as one of your ancestors in 10191
Agamemnon Atriedes: Leader of the Greeks, he actually makes it back to his home, only to be killed at his own welcome-home dinner. Those guilty of his murder are none other than his wife, Clytemnestra, and her lover, Aigisthos. Of course, they eventually pay for their betrayal of Agamemnon when Orestes, his son, slays Aigisthos.