Another article about people naming their babies "Barack":
There have been other presidential naming trends in the past century, according to Social Security Administration data. Franklin jumped to No. 33 in 1933, up from No. 147 in 1931. Dwight surged in the 1950s and Lyndon in the 1960s. Theodore hit its peak in the first decade of the 20th century.
“Honoring new presidents with baby namesakes used to be an American tradition,” said Laura Wattenberg, author of “The Baby Name Wizard.” But she pointed out that the custom faded around the time of Watergate, in part because people became more cynical about the presidency. [Link]