I think it’s a great idea to look up the interviewer, and try to figure out what might be an area of common ground. My boys all did this and all had exceptional admission rates including at all schools where they interviewed.
In my oldest’s case, for his H interview, he was feeling concerned because there seemed to be zero common ground - my son is a mathy nerd, not athletic, very feminist, totally not into any kind of exclusive clubs, from MA. The interviewer was a communications major, varsity athlete, member of some kind of fraternity/club that was very important to him in his business profile, from a state far away. But somehow DS figured out that they were both the oldest of three boys, and that led to a lovely conversation.
I think in the modern era you have to assume that anyone you are going to interact with, has googled you and at a minimum looked at your public Linked-In profile or similar.