Otunga was born in Elgin, Illinois, the son of a Kenyan father, Moses, and a white American mother, Billie, both of whom were educators.
Obama noted his interracial and international heritage: he was born in Honolulu, Hawaii to a Kenyan immigrant father and a white mother from Kansas.
Hamilton is the daughter of a Jamaican mother and Kenyan father, although both families trace their roots back to Scotland.
Otunga is the son of a Kenyan father, Moses, and white American mother, Billie, both of whom were educators.
Wanyeki was born in 1972 of a Canadian mother and Kenyan (Kikuyu) father, and grew up in Kenya.
Mr Obama - son of a Kenyan father and white mother from Kansas - first toured Africa in 1992.
President Barack Obama had a Kenyan father and an American mother of Northern European ancestry.
Then Senator Obama, the son of a white American mother and black Kenyan father, launched a campaign in January 2007 to be the Democratic party's 2008 presidential nominee.
He was born in 1961 in Hawaii, the son of a black Kenyan father and a white American mother.
Obama, having a Caucasian mother and Kenyan father of the Luo ethnic group, became the first African American as well as the first bi-racial president.