The ancestral background of presidents of the United States has been relatively consistent throughout American history. With the exception of John F. Kennedy, Martin Van Buren, and perhaps Dwight D. Eisenhower, every president has ancestors from Great Britain. Kennedy was of pure Irish descent, Van Buren was of Dutch lineage; and Eisenhower was of German and Swiss heritage. Barack Obama is the only president to have recent ancestry from outside Western Europe; his paternal family is of the Luo people of East Africa.