John Scantlebury Macdonald (May 30, 1871 – September 26, 1931) was a Canadian-born singer of Irish and Scottish descent, and recording executive. Under the pseudonym Harry Macdonough, he was one of the most prolific and popular tenors during the formative years of the recording industry. Based upon the ledgers of the four major record companies of the early twentieth century (Edison, Victor, Columbia and Brunswick), which are accessible online through the Discography of American Historical Recordings (DAHR), some of his most popular recordings included “Shine On, Harvest Moon” (with Elise Stevenson), “Down By The Old Mill Stream”, “They Didn’t Believe Me” (with Olive Kline), “Tell Me, Pretty Maiden” (with Grace Spencer), and “Where The River Shannon Flows”.