G. C. Edmondson

G. C. Edmondson was the working name of science fiction author Garry Edmonson (full name "José Mario Garry Ordoñez Edmondson y Cotton"). Although generally called a science fiction writer, he also wrote Westerns using the names Kelly P. Gast, J. B. Masterson, and Jack Logan. As he could also speak six languages he did translating work as well. - Wikipedia