William O'Brien
William O'Brien (2 October 1852 – 25 February 1928) was an Irish nationalist, journalist, agrarian agitator, social revolutionary, politician, party leader, newspaper publisher, author and Member of Parliament (MP) in the House of Commons of the United Kingdom of Great Britain and Ireland. He was particularly associated with the campaigns for land reform in Ireland during the late 19th and early 20th centuries as well as his conciliatory approach to attaining Irish Home Rule.
James O'Brien (oceanographer)
James O'Brien (born August 10, 1935, died September 20, 2016) was an emeritus Robert O. Lawton Professor of Meteorology and Oceanography at Florida State University. He believed sea levels were rising but predicted a more modest rise instead of by 2100 targeted by some other scientists. He stated that "sea level in Florida is going to continue to rise period. Unless we go back into an Ice age, we will continue to rise at over in 10 year. That's without any global warming."