A 15-minute video on the derp-background of Jeff Bezos including his maternal grandfather, Lawrence Preston Gise Gise was the Assistant Director, Division of Military Applications for the Atomic Energy Commission, a position he left in 1958 to become one of the founders of ARPA (later renamed to DARPA). ARPA/DARPA was the source for the founding of ARPANet/The World Wide Web. It's interesting in that Bezos' Wikipage does not mention any of his grandfather's affiliation with DARPA.
Who Was Jeff Bezos Before Amazon?