While it may seem a bit pretentious, the use of the middle initial is pragmatic. Kevin and Flynn are good Irish names. The combination of these two popular names is far from unique. Perhaps the most famous Kevin Flynn is the protagonist in the movie Tron played by Jeff Bridges. See https://en.wikipedia.org/wiki/List_of_Tron_characters#Kevin_Flynn
There are other Kevin Flynns including a reporter, a number of attorneys, and at least one patent attorney. So it can be helpful when doing searches to seek information on “Kevin E. Flynn” and patent to avoid having to cull out unrelated information.