I haven't been able to track down birth info on Abo and Bernard. My guess is that they are the two men in the back row far right in this family pic but they are listed as "unknown"
![](http://i33.tinypic.com/y32gy.jpg)
In this Obama Family photo are: (bottom row, from left) half-sister Auma, her mother Kezia Obama, Obama's step-grandmother Sarah Hussein Onyango Obama and unknown; (top row, from left) unknown, Barack Obama, half-brother Abongo (Roy) Obama, and three unknowns. (Sun Times) I think BO is 21 in this pic and those two men look to be very close to his age.