Akumu was born about 1920 in Karabondi, Nyanza, Kenya, the daughter of Njango but her mother is unknown.
Her husband was Hussein Onyango Obama, who she married in ABT 1930 in Siaya, Nyanza Province, Kenya. Their two known children were Barack Hussein (1936-1982) and Sarah (1933-?).
Might have had another daughter with Hussein Onyango Obama, named Auma (see Wikipedia, Nov 28, 2009).
In his memoir Dreams from My Father, her grandson, Barack Obama, wrote that she was miserable in her marriage and abandoned her husband and children and subsequently married again and moved to present-day Tanzania.