Isabella I - Biography of Queen Isabella I of Spain, with links and illustrations.
http://womenshistory.about.com/cs/medrenqueens/p/p_isabella_i.htm more info...
Isabella II - Information on Isabella II ,Queen of Spain 1833-1868, the second Spanish ruler .
http://womenshistory.about.com/library/bio/blbio_isabella_ii.htm more info...