Vice-Admiral Horatio Lord Nelson had a scandalous affair with actress Lady Emma Hamilton, wife of elderly aristocrat Sir William Hamilton. Emma later gave birth to Nelson’s daughter, Horatia.
Horatio Seymour served two non-consecutive terms as Governor of New York. He later lost the 1868 presidential election to Ulysses S. Grant.
Gov. Horatio Seymour gave a speech in Gotham shortly before the outbreak of the July 1863 New York City Draft Riots in which he blasted the Lincoln Administration’s policies, including the draft. Many Empire State Republicans blamed Seymour for practically encouraging a riot.
On Johnny Carson’s final Tonight Show, he showed a montage of guests who had appeared on the show. The final one shown – and only one of two black and white images – was Hubert Horatio Humphrey.
I think we had that one before.
Horatio Seymour, Democrat of New York, is elected President of the United States in Harry Turtledove’s alternate-history novel The Guns of the South, in which South African white supremacists with a time machine provide the Confederacy with AK-47s.
Actress Jane Seymour is currently married to James Keech, brother of Stacy Keech. Prior to this marriage, James was married to Holly Collins, sister of Judy Collins, who went with Stacy for three years and introduced his brother to her sister.
In 1984, British police arrested actor Stacy Keach at Heathrow Airport for cocaine possession. Keach pled guilty and served a nine-month sentence at Reading Prison.
About two months after the assassination of Martin Luther King, James Earl Ray was arrested at Heathrow while attempting to use a fake Canadian passport to leave the United Kingdom.
In 1980, Japanese police arrested musician Paul McCartney at Narita Airport for cannabis possession. After 10 days in jail, he was released and deported. He was told that he would not be welcome in Japan again, although a decade later he played a concert in Tokyo.
Astrid Kircherr, who became the live-in girlfriend of Stu Sutcliffe, takes credit for giving (McCartney and) the Beatles their original bowl cut when they were living in Hamburg in the early 1960s.
ETA: McCartney link
British actor John Hurt, perhaps best known for having a teeny, toothy little critter burst out of his chest in Alien, appeared in the music video for the Paul McCartney song “Take It Away,” from his 1982 album Tug of War.
Tug of war was contested at every summer Olympic games from 1900 through 1920. Since individual clubs could enter, the US won all 3 medals at the 1904 St. Louis Games, and Britain did the same in 1908 in London.
While the first International Special Olympics Summer Games were held in Chicago in 1968, the event did not receive permission from the U S Olympic Committee to use the title “Olympics” until 1971.
Big Macs consists of two all-beef patties, special sauce, lettuce, cheese, pickles, onions, on a sesame seed bun.
Robert Loggia played Tom Hanks’s hassled but fun-loving boss in the comedy Big.
In terms of big penises, New Hampshire comes in at No. 1 for average size. Wyoming residents are the smallest. (Wimpy Texans are in 35th place.)
Wyoming, in 1869, was the 1st state to grant women suffrage.
Nellie Tayloe Ross, of Wyoming, was the first woman elected governor of a state, in 1924.
Rather remarkable compared to common stereotypes, New Hampshire’s ethnic composition resembling that of the National Hockey League. 
Nelly Bly was the pen name of New York World reporter, Elizabeth Jane Cochran, who made a trip around the world in in 1889 in 72 days and 6 hours, to show that Jules Verne’s character Phileas Fogg could have won his bet.
The New York City Draft Riots of July 1863 weren’t fully put down until troops were rushed to the city from the battlefields of Gettysburg. Estimated casualties among the rioters, primarily poor Irish immigrants, range as high as 1000. The riots were loosely dramatized in the movie The Gangs of New York.