by Jove

By Jove, master marchant, by sea or by land / Would get but smale argent if I did not stand / His very good master, I may say to you, / When he hazards in hope what hap will insue.

1575, “Apius and Virginia”, in Isaac Reed, Octavius Gilchrist, editors, A Select Collection of Old Plays, London: Septimus Prowett, published 1826, page 353

Favours, by Jove that thunders! What art thou, fellow?

1623, William Shakespeare, The Tragedy of Antony and Cleopatra, act III, scene XIII

"Oh, as to that!"—and Lord Fulkeward roused himself to some faint show of energy. "Who wouldn't admire her? By Jove! Only, I tell you what—there's something weird about her eyes. Fact! I don't like her eyes."

1897, Marie Corelli, “Chapter I”, in Ziska: The Problem of a Wicked Soul, New York: Stone & Kimball, page 30

"I was sorry to fire my rifle, but, by Jove! there was no great choice." "We should not be here if you hadn't," said I, with conviction.

1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC

“By Jove! I’ve left my ulster in the waiting-room,” and hastened off to fetch it.

1913, Edgar Rice Burroughs, The Return of Tarzan, New York: Ballantine Books, published 1963, page 97

Well, I wasn't going to have any of that sort of thing, by Jove!

1916, P. G. Wodehouse, “Jeeves Takes Charge”, in A Wodehouse Miscellany