The ancestral background of presidents of the United States has been relatively consistent throughout American history. The most common ancestry of U.S. presidents is English, due to its origins as a group of former English colonies. With the exception of Martin Van Buren and possibly Dwight D. Eisenhower, every president has ancestors from the British Isles; Van Buren was of Dutch lineage and Eisenhower was of German and Swiss heritage. John F. Kennedy and Donald Trump are the only known presidents who did not have ancestors who arrived during the colonial period. Barack Obama, the country's first and so far only African American president, is the only president to have ancestry from outside of Europe; his paternal family is descended from the Luo people of Kenya. He is also believed to be a direct descendant of John Punch, a colonial-era slave born in modern-day Cameroon. There is no evidence that any president has had Indigenous American ancestry.