In an oddly related way this reminds me of a time prior to the Internet. In that era you would open up the Yellow Pages and call a company or a store and ask them if they "carried such and such widget". They would reply "no". You would then say "do you know of anyone who does" hoping for a tidbit of info or direction on who you could contact next. The person on the other end would inevitably tell you to, as if this was valuable info, "why don't you try the Yellow Pages?". People really did that. The irony is not that you got their number from the YP but that they thought they were giving you good advice by telling you to use something that was as ubiquitous as doing a google search is today.
It's an understandable question. Many media outlets are treading carefully, identifying him by his accomplishments (successful entrepreneur and investor) and position (CEO of SurveyMonkey), when in fact the main reason people have heard of Dave Goldberg is that his wife is Facebook COO and Lean In author Sheryl Sandberg. And, while it's true that you could figure out his identity using a search engine (as one commenter suggested), few sources would be so blunt in their explanation of the story's apparent importance, so I think asking the question here isn't out of line. (CNN.com, to its credit, ran the story under the headline "Facebook exec's husband dies".)