Thanks for the pix, I remember those from the other thread that you posted them on :)
Ok the lower right one, the professional pic from school, is it Punahou or Noelani, I forget.
Of the five pictures, the top center and top right are baby David, NOT POTUS Barry who is seven years older. They are similar, but different as one would expect for some half brothers.
The darker boy in the studio picture of the two boys is Mark Ndesandjo born in 1965. His same facial features as an adult can clearly be seen in the pictures in this Daily Mail article:
It’s just an image supplied by the campaign, I don’t recall any indication of when it was taken or where. It came from Google Images originally. I simply saved the image.