Some unusual middle names of U.S. presidents are Birchard for Rutherford Hayes, Gamaliel for Warren Harding, Delano for Franklin Roosevelt, Milhous for Richard Nixon and Hussein for Barack Obama. Another unusual middle name is S., as in Harry S. Truman, which did not stand for anything but was a compromise between Shipp and Solomon, names of both his grandfathers. Many of the nation's presidents did not have middle names.
Rutherford B. Hayes was the 19th president of the United States. Birchard was his mother Sophie's maiden name. His mother named him Rutherford after his father, who died before he was born, and he went by the name "Rud" as a child.
Warren Gamaliel Harding was the 29th president. He was the first of eight children and was named after his great-uncle, Rev. Warren Gamaliel Bancroft.
An only child, Franklin Delano Roosevelt, the nation's 32nd president, got his middle name from his mother. Sara Ann Delano Roosevelt and her son Franklin shared more than a name, as both were quite devoted to one another even after Franklin married.
Richard Milhous Nixon's middle name is also his mother maiden name. Nixon, the 37th president, was the second of five boys born to Francis and Hannan Milhous Nixon.
The 44th president, Barack Hussein Obama is a junior, named after his father, Barack Hussein Obama of Kenya. The senior Obama was married to Ann Dunham from Wichita, Kansas -- the mother of the president.