Title: Family of Barack Obama
Content:  Barack Obama Sr., Barack Obama's father, was the son of Onyango and his second wife Habiba Akumu Obama. Educated in the US at the University of Hawai'i and Harvard University, he returned to Kenya, where he became an economist with the government. He served in the ministries of transportation and finance. Obama Sr. married three times, and he fathered a daughter and at least four sons in addition to Barack II.
Title: Barack Obama Sr.
Content:  Barack Hussein Obama Sr. ( 18 June 1934 – 24 November 1982) was a Kenyan senior governmental economist and the father of Barack Obama, the 44th president of the United States. He is a central figure of his son's memoir, Dreams from My Father (1995). Obama married in 1954 and had two children with his first wife, Kezia. He was selected for a special program to attend college in the United States and studied at the University of Hawaii where he met Stanley Ann Dunham, whom he married in 1961. They had a son, Barack II. Dunham divorced Obama three years later. The elder Obama later went to Harvard University for graduate school, where he earned an M.A. in economics, and returned to Kenya in 1964. He saw his son Barack once more, when his son was about 
Title: African-American candidates for President of the United States
Content: His father, Barack Obama Sr. (1936–1982), was a Luo Kenyan from Nyang'oma Kogelo. His parents had met and married in Hawai'i. They separated and divorced when he was a child. His father, Barack Obama Sr. (1936–1982), was a Luo Kenyan from Nyang'oma Kogelo. His parents had met and married in Hawai'i. They separated and divorced when he was a child. His father, Barack Obama Sr. (1936–1982), was a Luo Kenyan from Nyang'oma Kogelo. His parents had met and married in Hawai'i. They separated and divorced when he was a child. His father, Barack Obama Sr. (1936–1982), was a Luo Kenyan from Nyang'oma Kogelo. His parents had met and married 
Title: Lady Whitehouse
Content:  Barack Obama, Sr., was born in the Nyanza Province. He is the father of the President of the United States Barack Obama, Jr. Others include the independence fighters and socialist politicians Achieng Oneko and Jaramogi Oginga Odinga, the latter's son Prime Minister Raila Odinga, former ministers Robert Ouko and Tom Mboya, and the historian Bethwell Allan Ogot.
Title: African-American heritage of presidents of the United States
Content:  President Barack Obama, who served as the 44th president of the United States from 2009 to 2017, had an African father and an American mother of mostly European ancestry. His father, Barack Obama Sr. (1936–1982), was a Luo Kenyan from Nyang'oma Kogelo, Kenya. In July 2012, drawing on a combination of historical documents and Y-DNA analysis, Ancestry.com found a strong likelihood that Obama—through his mother, Stanley Ann Dunham—was descended from John Punch, known as the "first official slave in the English colonies."
Title: Family of Barack Obama
Content:  The family of Barack Obama, the 44th president of the United States, is a prominent American family active in politics. Obama's immediate family circle was the first family of the United States from 2009 to 2017, and are the first such family of African-American descent. His immediate family includes his wife Michelle Obama and daughters Malia and Sasha Obama. Obama's wider ancestry is made up of people of Kenyan (Luo), African-American, and Old Stock American (including originally English, Scots-Irish, Welsh, German, and Swiss) ancestry.
Title: Family of Barack Obama
Content:  At times using a variation of the name of his father, Onyango Obama, Omar Okech Obama is a half-uncle of Barack Obama. Born on June 3, 1944, in Nyang'oma Kogelo, he is the eldest son of Onyango and his third wife, Sarah Obama. He moved to the United States in October 1963 when he was 17 years old as part of Kenya president Tom Mboya's Airlift Africa project, to send promising Kenyan students to the US for education, particularly undergraduate and graduate school. Once he arrived in the country, his half-brother, Barack Obama Sr., found him a place at a boys' school then known as Browne & Nichols, in Cambridge, Massachusetts. He later dropped out of 
Title: Dreams from My Father
Content:  Barack Obama recounts how his parents met, and his own life until his enrollment at Harvard Law School in 1988. His parents were Barack Obama Sr. of Kenya, and Ann Dunham of Wichita, Kansas, who had met while they were students at the University of Hawaii. In the first chapter, speaking of his father, Obama states "[h]e had left Hawaii back in 1963, when I was only two years old." Obama's parents separated in 1963 and divorced in 1964, when he was two years old. The elder Obama later went to Harvard to pursue his PhD in economics. After that, he returned to Kenya to fulfill the promise to his nation. Obama himself formed an image of his absent father 
Title: Ambira
Content:  Barack Obama, Sr., was born in the Nyanza Province. He is the father of the President of the United States Barack Obama, Jr. Others include the independence fighters and socialist politicians Achieng Oneko and Jaramogi Oginga Odinga, the latter's son Prime Minister Raila Odinga, former ministers Robert Ouko and Tom Mboya, and the historian Bethwell Allan Ogot.
Title: Barack Obama Sr.
Content:  his master's degree. At Harvard he started dating Ruth Beatrice Baker, a Jewish-American woman. She went with him to Kenya in 1964. They married late that year and had two sons, Mark and David. The couple separated in 1971 and divorced in 1973. In Kenya, Obama Sr. reconnected with his first wife Kezia. She had two sons after his return: Abo (b. 1968) and Bernard (b. 1970), believed to be his children. Barack Obama, in his memoir Dreams from My Father (1995), said that his father's family had questioned whether Abo and Bernard are Barack Sr.'s biological sons. The senior Obama fathered his last son George in 1982 with Jael Otinyo. George was about six months old when Obama Sr. was killed in a car accident. George was raised by his mother, who later remarried; his stepfather cared for him as well.

Question: Who is the father of Barack Obama?
Answer: Barack Obama Sr.
Barack Hussein Obama, Sr.
Barack Hussein Obama.