Billy Boy

The terms “Hillbilly” and “Red Neck” both originated during the Battle of the Boyne. England’s Dutch born King William III was known to his Protestant Irish followers as “Billy Boy” and his followers were called “Hill billys” and “Red Necks.”
There’s a bit of irony in the last verse where Billy Boy is asked about the age of his fiancée. He states that she is “Three times six and four times seven, twenty-eight and eleven,” which adds up to 85, hardly a young thing!