I just answered a reference question about President Bush's middle name.  In the process I found this website and thought I'd share:

Genealogy of the presidents of the USA

Users click a president's picture and then click on names in family tree charts.  FYI, (in case you forgot), George H.W. Bush's maternal grandfather's name was George Herbert Walker.

Of course, a list of presidents is available <> within the "people" pathfinder <> on the Learning Page <>.

Also, lots of good web links about Presidents are available via the Internet Public Library's POTUS: Presidents of the United States feature: <>.