Old Pretender.
James Edward, son of James II, was so called by the adherents of the Hanoverian succession.
Old Rough and Ready.
General Zachary Taylor, President of the United States in 1849, was so called by his soldiers during the Mexican war.
Old Rowley.
A nickname of Charles II.
Old Style.
The old or Julian Calendar, superseded in England by the Gregorian in 1751, but still in use in Russia.
Oleron, Laws of.
A code of commercial and maritime laws founded on the Consolato del Mare, issued in the reign of Louis IX of France.