According to Pierce Genealogy, Frederick Clifton Peirce, Esq., 1882, provided 11/10/99 by Richard L. Pierce and corrected by Barb Petty 1/7/01, Barbara Bush's Pierce correct ancestry is as follows:
Thomas1 PIERCE 1583-4? -1666 m. Elizabeth WORTINGTON b.1595-6
Thomas2 PIERCE 1618-1683 m.1635 Elizabeth COLE d.1688
James3 PIERCE 1659-1742 m.(1)abt.1687 Elizabeth PARKER d.1715
James4 PIERCE 1690-1773 m.(2)bef.1711 Phebe UNKNOWN d.1776
Joshua5 PIERCE 1722-1771 m(2)1753 Esther RICHARDSON 1727-1819
James6 PIERCE 1768-1849 m.1795 Mary STACY 1774-1847
Gen. James7 PIERCE Jr. 1810-1874 m.1839 Chloe HOLBROOK 1816-1886
Jonas8 James PIERCE 1839-1913 m.1865 Kate PRITZEL 1841-1931
Scott9 PIERCE 1866-aft.1930 m.1891 Mabel MARVIN 1869-193?
Marvin10 PIERCE 1893-1969 m.(1)1918 Pauline ROBINSON 1896-1949
Barbara11 PIERCE 1925- m.1945 George Herbert Walker BUSH 1924-
George Walker BUSH 1946- m.1977 Laura WELCH 1946-
http://www.bearhaven.com/family/cousin/barbara.htmlPierce and Barbara Bush share a common ancestor, thus President George W. Bush is not only related to Pierce, but in some photos (as with the one on this page) there is an observable facial resemblance between the two
http://en.wikipedia.org/wiki/Franklin_Pierce-edit-
removed some email adys that I missed.