Can you post a link to this version of events?
http://genealogy.about.com/od/aframertrees/p/barack_obama.htm
Third Generation (Grandparents):
4. Hussein Onyango OBAMA was born about 1895 and died in 1979. Before settling down to work as a cook for missionaries in Nairobi he was a traveler. Recruited to fight for colonial power England in World War I, he visited Europe and India, and afterward lived for a time in Zanzibar, where he converted from Christianity to Islam, family members said.
5. Akumu
Hussein Onyango OBAMA had several wives. His first wife was Helima, with whom he had no children. Second, he married Akuma and they had the following children:
i. Sarah OBAMA
1. ii. Barack Hussein OBAMA, Sr.
iii. Auma OBAMA
Onyango’s third wife was Sarah, the one often referred to by Barack as his “grandmother.” She was the primary caregiver for Barack OBAMA Sr. after his mother, Akuma, left the family when her children were still young.