Oliver Beirne (March 26, 1811 - April 21, 1888) was a landowner from western Virginia (now formally West Virginia), one of the owner of the Old Sweet Springs resort, and sole heir to plantation millionaire John Burnside, of whom he was a longtime friend.
Beirne partnered with John Burnside in a mercantile business established in New Orleans in 1837.
[4] Oliver Beirne married Margaret Melinda Caperton (1812–1844) on August 2, 1831.
His children were: John, Jane E., Elizabeth "Bettie" Miles (1835–1874) (who married William Porcher Miles), Andrew, Susan Robinson (1840–1871) (married Major Henry Robinson), Nancy (married first Samuel B. Parkman, killed at Antietam, second Emil von Ahlefeldt) and Alice.
[4] John Burnside, his longtime friend from the time when they worked together in New Orleans, was a lifelong bachelor, and when he died on June 29, 1881, he left his entire estate, estimated 5 or 6 million dollars, to Oliver Beirne.