In the novel 'Atlas Shrugged' by Ayn Rand what were the names of the three students who were taught by which two professors?

John Galt, Francisco d'Anconio and Ragnar Danneskjold were the students. I am not sure of the professors. One is Dr. Hugh Akston; the other may be Dr. Robert Stadler or Dr. Ferris.

John Galt -- Galt's Gulch -- "Amongst them are Francisco d'Anconia and Ragnar Danneskjöld, with whom he had studied at Patrick Henry University."

Dr. Robert Stadler -- A former professor at Patrick Henry University, mentor to Francisco d'Anconia, John Galt and Ragnar Danneskjöld.

Hugh Akston -- Identified as "One of the last great advocates of reason." He was a renowned philosopher and the head of the Department of Philosophy at Patrick Henry University, where he taught Francisco d'Anconia, John Galt, and Ragnar Danneskjöld.


https://en.wikipedia.org/wiki/Characters_in_Atlas_Shrugged#Hugh_Akston