evidence: NAIROBI, Kenya — Sarah Obama, the matriarch of former President Barack Obama's Kenyan family, has died, relatives and officials confirmed Monday. She was at least 99 years old. [...] "The passing away of Mama Sarah is a big blow to our nation. We’ve lost a strong, virtuous woman, a matriarch who held together the Obama family and was an icon of family values," President Uhuru Kenyatta said.