As of 2018, there have been 5 United States Presidents with the same surname (last name): Adams, Harrison, Johnson, Roosevelt, and Bush.

John Adams (1735 - 1896) served from March 4, 1797 to March 4, 1801. His son, John Quincy Adams (1761 - 1848) served from March 3, 1825 to March 4, 1829.

William Henry Harrison (1773 - 1841) served from March 4, 1841 to April 4, 1841. He died of pneumonia 31 days into his term. His grandson, Benjamin Harrison (1833 - 1901) served from March 4, 1889 to March 4, 1893.

Andrew Johnson (1808 to 1875) served from April 15, 1865 to March 4, 1869. Lyndon Baines Johnson (1908 to 1973) served from November 22, 1963 to January 20, 1969. There is no relation between these two.

Theodore Roosevelt (1858 to 1919) served from September 14, 1901 to March 4, 1909. His 5th cousin, Franklin Delano Roosevelt (1882 to 1945) served from March 4, 1933 to April 12, 1945. FDR is the only US President to serve more than two terms in office.

George Herbert Walker Bush (born 1924) served from January 20, 1989 to January 20, 1993. His son, George Walker Bush (born 1946) served from January 20, 2001 to January 20, 2009.

More Info: en.wikipedia.org