John Colton's blog

Last summer people in the college office gathered genealogical info from faculty and staff, compiled the info into a database, searched for common ancestors to see who was related to whom. For fun, they also included in the database: former BYU presidents, some current and past LDS leaders, signers of the Declaration of Independence, European royalty, Mayflower travelers, US Presidents, etc. I arrived too late to get my "relatives report" last summer, but just got mine yesteday.

Disclaimer: It uses info submitted to Ancestral File, which may or may not be accurate. Here's the website where you can access Ancestral File:
http://www.familysearch.org/

But here are some cool findings regarding my relatives:
(Note: FFMF, for example, = "father's father's mother's father")

Past LDS church presidents:
Benson, Ezra Taft's FFMMMFMMF = my FFFMFFMFFF = T. CADWELL(1679,CT).
     (We are 8th cousins, once removed)
Grant, Heber J's FMFMMFMF = my MMMFMMMFMMF = J. BREWSTER(1593,England).
     (We are 7th cousins, 3 times removed)
Hinckley, Gordon B's FFFFFFFMMF = my MMMFMMMFFMF = J. JENNEY(1596,England).
     (We are 9th cousins, once removed)
Kimball, Spencer's FFFFMMFFF = my MMMFMMMFFFF = A. WOOD(1582,England).
     (We are 8th cousins, twice removed)
Lee, Harold B's FFMFFFMFF = my FFFMFFMMMF = W. CHATTERTON(1640,CT).
     (We are 8th cousins, once removed)
Smith, George Albert's MMFMFMFFFF = my MMMFMMMFFFF = A. WOOD(1582,England).
     (We are 9th cousins, once removed)
Smith, Joseph Fielding's MFFMMMF = my FFFMFMFMFF = J. PETTIBONE(1640,Connecticut).
     (We are 6th cousins, 3 times removed)
Snow, Lorenzo's FFMFFF = my MMMFMFMMFF = R. PHILLIPS(1635,England).
     (We are 5th cousins, 4 times removed)
Woodruff, Wilford's MMMMMFM = my FFFMFFMFFM = E. WILSON(1632,England).
     (We are 6th cousins, 3 times removed)
Young, Brigham's MFMFMF = my FFFFFMMMFFF = J. BENT(1596,England).
     (We are 5th cousins, 5 times removed)

Current LDS church leaders (apostles):
Ballard, Russel's MFMFFMMMF = your FFFMFMFMFF = J. PETTIBONE(1640,Connecticut).
     (We are 8th cousins, once removed)
Bednar, David's MFFFFMFMFF = your MMMFMFMFMMF = M. PRATT(1600,Eng.).
     (We are 9th cousins, once removed)
Cook, Quentin L's MFMMF = your FFFMF = S. MERRILL(1780,Connecticut).
     (We are 4th cousins)
Faust, James's MMMMFMMMF = your FFFFFFFMMF = E. TAYLOR(1642,Eng). (We are 8th cousins, once removed)
Hales, Robert's FMFFMMFF = your FFFFFFFF = B. COLTON(1695,MA). (We are 7th cousins)
Oaks, Dallin's MFFFFMMMFF = your FFFFFMMFMFF = G. BELCHER(1606,Eng.).
     (We are 9th cousins, once removed)
Packer, Boyd's FMFMMMMFFF = your MMMFMFMMMMF = G. ALDRIDGE(1605,England).
     (We are 9th cousins, once removed)
Perry, Tom's FFFFFFFMMF = your MMMFMFMFMMF = M. PRATT(1600,Eng.).
     (We are 9th cousins, once removed)

The Three Witnesses to the Book of Mormon
Cowdery, Oliver's FFMMMFF = your FFFFFFMMMMF = P. BULKLEY(1582,England).
     (We are 6th cousins, 4 times removed)
Harris, Martin's FMMMFF = your FFFFFMMFMFF = G. BELCHER(1606,Eng.).
     (We are 5th cousins, 5 times removed)

Signers of the Declaration of Independence
Adams, John's FMMMMF = your MMMFMMMFFFFF = N. ATWOOD(1539,England).
     (We are 5th cousins, 6 times removed)
Carroll, Charles's MMFFFM = your MMMFMFMMFFFMM= M. GRAZEBROOK(1556,England).
     (We are 5th cousins, 7 times removed)
Paine, Robert Treat's FMMMF = your FFFFFMMMFMFF = T. BOURNE DEACON(1583,England).
     (We are 4th cousins, 7 times removed)
Wolcott, Oliver's FF = your FFFFFFMFMF = S. WOLCOTT(1624,England).
     (We are first cousins, 8 times removed)

Travelers on the Mayflower
Brewster, William = MMMFMMMFMMFF
     (my 10th great-grandfather)

U.S. Presidents (I'm tired of counting M's and F's, so I'll let the interested reader figure out the exact relationships from here on out.)
Adams, John's FMMMMF = your MMMFMMMFFFFF = N. ATWOOD(1539,England).
Adams, Quincy's FFMMMMF = your MMMFMMMFFFFF = N. ATWOOD(1539,England).
BUSH, George H. W.'s FMMMMMMFFFF = your MMMFMMMFFF = H. ATWOOD OR WOOD(1620,England).
BUSH, George W.'s FFMMMMMMFFFF = your MMMFMMMFFF = H. ATWOOD OR WOOD(1620,England).
Coolidge, Calvin's FMMMMFMFFF = your MMMFMFMFFFF = J. WHITMARSH(1596,England).
Garfield, James's MMFFFMMFMF = your FFFFFFMMMMFF = E. BULKELEY REVEREND(1540,England).
Harding, Warren's FFFFFFFFFM = your MMMFMFMFFMFM = M. HARDING(1600,Of England).
Hayes, Rutherford's MMMMMMF = your FFFFFFFFMF = T. COOPER(1630,England).
Hoover, Herbert's MFMMFMFMFF = your MMMFMFFFMFF = H. BROOKS(1592,England).
Nixon, Richard's FMMFFFFFF = your FFFMFMMFMMF = J. MOORE(1614,Connecticut).
Pierce, Franklin's FMFFFF = your FFFMFFFFFF = N. MERRILL(1601,England).
Roosevelt, Franklin's MFMMMMMFMF = your MMMFMMMFFMF = J. JENNEY(1596,England).
Taft, William's MFMMMMFFF = your MMMFMFMMMMF = G. ALDRIDGE(1605,England).

European Royalty
King Of ENGLAND, Edward II = MMMFMMMFMFFMFMFFMFFFF
King Of ENGLAND, Edward III = MMMFMMMFMFFMFMFFMFFF
King Of ENGLAND, Edward I Longshanks = FFFMFMFMMMFFMFMFFFMMF
King Of ENGLAND, Henry I = FFFMFMFMMMFFMFMFMMFFFFFMF
King Of ENGLAND, Henry II = FFFMFMFMMMFFMFMFMMFFFFF
King Of ENGLAND, Henry III = FFFMFMFMMMFFMFMFMMFFF
King Of ENGLAND, John Lackland = FFFMFMFMMMFFMFMFMMFFFF
King Of ENGLAND, William the Conquerer = FFFMFMFMMMFFMFMFMMFFFFFMFF
King Of FRANCE, Louis VII = FFFMFMFMMMFFMFMFMMFMFFFF
King Of FRANCE, Louis VIII the Lion = FFFMFMFMMMFFMFMFMMFMFF
King Of FRANCE, Louis VI The Fat = FFFMFMFMMMFFMFMFMMFFFMMFF
King Of FRANCE, Philippe Auguste II = FFFMFMFMMMFFMFMFMMFMFFF
King Of FRANCE, Philippe I = FFFMFMFMMMFFMFMFMMFFFMMFFF
King Of FRANCE, Philippe IV = MMMFMMMFMFFMFMFFMFFFMF
King Of GERMANY, Phillipp II = FFFMFMFMMMFFMFMFMMFMMMF
King Of HUNGARY, Andras II = MMMFMMMFMFFMFMFFMFFFMFMMF
King Of HUNGARY, Bela III = MMMFMMMFMFFMFMFFMFFFMFMMFF
King Of HUNGARY, Geza II = MMMFMMMFMFFMFMFFMFFFMFMMFFF
King Of HUNGARY, Istvan V = MMMFMMMFMFFMFMFFMFFMMMMF
King Of SCOTLAND, David I The Saint = MMMFMMMFMMFMFFMMMFMFFMFFF
King Of SCOTLAND, Duncan I = MMMFMMMFMMFMFFMMMFMFFMFFFFF
King Of SCOTLAND, Malcolm III = MMMFMMMFMMFMFFMMMFMFFMFFFF
King Of SCOTLAND, William I The Lion = MMMFMMMFMMFMFFMMMFMFFMF
Princess Of HUNGARY, Piroska = MMMFMMMFMFFMFMFFMFFFMFMFMMFM
Princess Of KIEV, Evfrosiniya = MMMFMMMFMFFMFMFFMFFFMFMMFFM


It looks like the the computer science dept has put the database & tool on the web, so if you want to create a similar thing for yourself, try this:
http://roots.cs.byu.edu/digroots/selfafninfo.php