Byron, John, naval officer, grandfather of the poet, nicknamed from his misfortunes “Foul-weather Jack”; accompanied Anson in his voyage round the world, but was wrecked in his ship the Wager; suffered almost unexampled hardships, of which he wrote a classical account on his safe return home; he rose to the rank of admiral, and commanded the squadron in the West Indies during the American war; died in England (1723‒1786).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Byron, Henry James * Byrsa