I was alerted to the Mathematics Genealogy Project (https://www.mathgenealogy.org) today, which records detail of many - but not all - mathematics (and some computer science) PhD etc. students and their advisors. My husband isn’t in the database, but his PhD supervisor is. So I stepped back, a generation at a time, to see where we got to. Being a genealogist I couldn’t resist this! From my husband through his supervisor and her supervisor etc. we can reach Isaac Newton. And back from him we can get to Galileo Galilei. Given my husband’s first degree was in physics and astronomy and he works as a space scientist now it’s a pretty cool connection, albeit very distant! Makes a change from me looking up genealogical family trees. I know there are a few Maths PhD types here. You may want to have a look at the database …