Manuel Garcia O'Kelly-Davis
from Heinlein's "The Moon Is a Harsh Mistress" and sequels.
https://peakd.com/story/@creatr/the-moon-is-a-harsh-mistress-by-robert-a-heinlein-book-review
https://www.shmoop.com/study-guides/the-moon-is-a-harsh-mistress/mannie.html