Using my access to wielcy.pl (Minakowski's Great Genealogy website) I have been able to link myself to Pope John Paul II. My 1st cousin once removed was married to a direct descendant of the Great Sejm in Poland. Through this website, it opens up access to 400,000+ people for 49 zloty (about 12 euros) for one year unlimited access.
"Here (Wielcy.pl) you have The Great Genealogy - over 400,000 people from elites of Central-Eastern Europe (former Rzeczpospolita, now Poland, Lithuania, Ukraine, Belarus and Latvia) since about 850 to 2012 A.D. One, big family: N. Copernicus, M. Curie, F. Chopin, T. Kosciuszko, John Paul II, J. Conrad, H. Sienkiewicz, C. Miłosz, J. Pilsudski, A. Smetona, B. Komorowski, J. Buzek... Famous: writers, painters, musicians, actors, journalist, discoverers, historians, generals, philosophers, churchmen, lawyers, politicians: before 19th c., 19th c., pre-war, post-war, contemporary... And almost half a million people who are one family with us."