William O'Brien (American football)
William Edward O'Brien (March 11, 1923 – December 1, 2000) was an American football coach and official. He was the seventh head football coach at the Southern Illinois University Carbondale, serving for three seasons, from 1952 to 1954, and compiling a record of 6–20. O'Brien was an official in the National Football League (NFL) for 18 seasons, from 1967 through 1983, officiating in Super Bowl X in 1976. He wore number 83 for the major part of his NFL career. He was also a professor at Southern Illinois University.
William O'Brien, 4th Earl of Inchiquin
Inchiquin was Whig Member of Parliament for Windsor from 1722 to 1727, for Tamworth from 1727 to 1734, for Camelford from 1741 to 1747 and for Aylesbury from 1747 to 1754. In 1725, he had been appointed a Knight Companion of the Order of the Bath. From 1740 to 1741, he was Grand Master of the Premier Grand Lodge of England, Governor of County Clare from 1741 to 1777 and Custos Rotulorum of County Clare from 1762 to 1767. From 1744 to 1751, he was a Lord of the Bedchamber to Frederick, Prince of Wales and admitted to the Privy Council of Ireland in 1753. On his death in 1777, without surviving male heirs, his titles passed to his nephew, Murrough O'Brien, who was later created Marquess of Thomond.