I wanted to publish some presidential nicknames I've come across in the biographies I've read so far. I owe a debt of gratitude to Wikipedia for jogging my memory on some of the more obscure names.
Of note, Andrew Jackson (Old Hickory) inspired the nicknames of two later presidents; James Polk (Young Hickory) and Franklin Pierce (Young Hickory of the Granite Hills). Jackson's tough guy populism made him a kind of Ronald Reagan figure for the next generation, with many candidates claiming to be his legacy.
Five of the first 22 presidents' nicknames were preceded by 'Old', showing a trend where the second and third generation of Americans wanted to be less known as revolutionary and known more for being established.
I think that my personal favorite nickname remains 'The Careful Dutchman' (Van Buren) closely followed by John Quincy Adams (Old Man Eloquent).
Here's the list:
The American Cincinnatus
The Survivor of Monongahela (used mostly during the revolution)
The Duke of Braintree
King John the Second
The Sage of Monticello
The Negro President (for his victory in the election of 1800 since he won because of the 3/5's compromise)
Little Jemmy (he was only 5'4'')
His Little Majesty
Nothing too creative
John Quincy Adams:
Old Man Eloquent
The Hero of New Orleans
The Careful Dutchman
The Little Magician
Old Kinderhook (O.K)
Martin Van Ruin (by his Whig opponents)
Old Rough and Ready
The American Louis Phillepe
Young Hickory of the Granite Hills
Ten-Cent Jimmie (because he once said a man should be able to live on 10 cents a day)
The Rail Splitter
The Tennessee Tailor
Unconditional Surrender Grant
Rutherford B. Hayes:
The Hangman of Buffalo