User blog comment:Eobard95/Is Felicity the ancestor of Eobard Thawne?/@comment-27700324-20161012180626

As shown in the future, Smoak technologies takes over Palmer tech eventually. This is why Eobard knows so much about her, he is witnessing the history of a tech genius unfold. It's like being able to see where Steve Jobs was at a long time ago. There are probably tons of biographies, but none saying she worked with the Arrow. He is interested in seeing that for himself. So no, i don't think your theory is correct. But there is a reason for Eobard's interest and that is the fact that he is a historian from the future and likes to know these things. It actually made me suprised that he didn't want to work with the Arrow in the second half of the first crossover.