Even worse than Jewish ancestry for Ferdinand &/or Isabella, the grand
inquisitor Torquemada had Jewish ancestry 4 generations back. See
http://shanmonster.bla-bla.com/witch/hunters/torquemada.html

On http://www.sephardim.com/ it says Ferdinand's grandmother was Jewish,

as does http://www.penteli.com/greekjews/sefarad.htm

His pedigree can be found at
http://homepages.rootsweb.com/~pmcbride/iberia/p2.htm#P20

Isabella's is partly at
http://enterprise.is.tcu.edu/~rwoodward/isabelii/d1.htm

Torquemada's seems a bit more elusive on-line.

All sites located with a google search.

Irene Newhouse
Kihei HI