John Burke

Royal astronomer from London, England. In the 21st Century, he charted the star of a world later known as Sherman's Planet. He often walked with a cane, but concealed in it a short range laser emitter. Which he used in self-defense against the drugged foot soldiers of World War III; to help his friend Zefram Cochrane and Monica Burke escape the Optimum Movement. By the 23rd Century he was hailed by Pavel Chekov (and by his account, the rest of Russia), as Ivan Burkhoff.

(TOS episode: "The Trouble with Tribbles", TNG novel: Federation)