Ok, read the following list carefully.
1 George Washington
2 John Adams, 1797-1801
3 Thomas Jefferson, 1801-09
4 James Madison, 1809-17
5 James Monroe, 1817-25
6 John Quincy Adams, 1825-29
7 Andrew Jackson, 1829-37
8 Martin Van Buren, 1837-41
9 William Henry Harrison, 1841
10 John Tyler, 1841-45
11 James Knox Polk, 1845-49
12 Zachary Taylor, 1849-50
13 Millard Fillmore, 1850-53
14 Franklin Pierce, 1853-57
15 James Buchanan, 1857-61
16 Abraham Lincoln, 1861-65
17 Andrew Johnson, 1865-69
18 Ulysses Simpson Grant, 1869-77
19 Rutherford Birchard Hayes, 1877-81
20 James Abram Garfield, 1881
21 Chester Alan Arthur, 1881-85
22 Grover Cleveland, 1885-89
23 Benjamin Harrison, 1889-93
24 Grover Cleveland, 1893-97
25 William McKinley, 1897-1901
26 Theodore Roosevelt, 1901-09
27 William Howard Taft, 1909-13
28 Woodrow Wilson, 1913-21
29 Warren Gamaliel Harding, 1921-23
30 Calvin Coolidge, 1923-29
31 Herbert Clark Hoover, 1929-33
32 Franklin Delano Roosevelt, 1933-45
33 Harry S Truman, 1945-53
34 Dwight David Eisenhower, 1953-61
35 John Fitzgerald Kennedy, 1961-63
36 Lyndon Baines Johnson, 1963-69
37 Richard Milhous Nixon, 1969-74
38 Gerald Rudolph Ford Jr , 1974-77
39 James Earl Carter, 1977-81
40 Ronald Wilson Reagan, 1981-89
41 George Herbert Walker Bush, 1989-1993
42 William Jefferson Clinton, 1993- 2001
43 George W. Bush, 2001-
What is odd about the names of these men (all presidents of the USA, obviously), considering the country which they led?