LDS Apostles - Who's Related to Who

P-Joseph Smith

Brigham Young called three different sons to be Apostles.

-Oliver Cowdery

-David Whitmer

-Martin Harris

-Thomas B. Marsh

-David W. Patten

P-Brigham Young

-Heber C. Kimball

-Orson Hyde

-William E. M'Lellin

-Parley P. Pratt

-Luke S. Johnson

-William Smith - younger brother of Joseph Smith

-Orson Pratt - younger brother of Parley P. Pratt

-John F. Boynton

-Lyman E. Johnson - younger brother of Luke S. Johnson

-John E. Page

P-John Taylor

P-Wilford Woodruff

-George A. Smith - first cousin of Joseph Smith

-Willard Richards - first cousin of Brigham Young

-Hyrum Smith - older brother of Joseph Smith

-Lyman Wight

-Amasa Lyman - third cousin of George A. Smith

-Ezra T. Benson

-Charles C. Rich

P-Lorenzo Snow - brother-in-law to Brigham Young

-Erastus Snow - distant cousin of Lorenzo Snow

-Franklin D. Richards - nephew to Willard Richards

-Jedidiah M. Grant

-John Willard Young - son of Brigham Young

-Daniel H. Wells

-George Q. Cannon

P-Joseph F. Smith - son of Hyrum Smith

-Joseph Angell Young - son of Brigham Young

-Brigham Young Jr. - son of Brigham Young

-Albert Carrington

-Moses Thatcher

-Francis M. Lyman - son of Amasa Lyman

-John Henry Smith - son of George A. Smith

-George Teasdale

P-Heber J. Grant - son of Jedidiah M. Grant

-John W. Taylor - son of John Taylor

-Marriner W. Merrill

-Anthon H. Lund

-Abraham H. Cannon - son of George Q. Cannon

-Matthias F. Cowley

-Abraham O. Woodruff - son of Wilford Woodruff

-Rudger Clawson

-Reed Smoot

-Hyrum M. Smith - son of Joseph F. Smith, grandson of Hyrum Smith

P-George Albert Smith - son of John Henry Smith, grandson of George A. Smith

-Charles W. Penrose

P-David O. McKay

-George F. Richards - son of Franklin D. Richards

-Orson F. Whitney - grandson of Newell K. Whitney and Heber C. Kimball

-Anthony W. Ivins - cousin of Heber J. Grant, son-in-law of Erastus Snow

P-Joseph Fielding Smith - son of Joseph F. Smith, grandson of Hyrum Smith

-James E. Talmage

-Stephen L. Richards - grandson of Willard Richards

-Richard R. Lyman - son of Francis M. Lyman, grandson of Amasa Lyman

-Melvin J. Ballard

-John A. Widtsoe (Norweigan)

-Joseph F. Merrill - son of Marriner W. Merrill

-Charles A. Callis

-J. Reuben Clark

-Alonzo Hinckley

-Albert E. Bowen

-Sylvester Q. Cannon - son of George Q. Cannon

P-Harold B. Lee

P-Spencer W. Kimball - grandson of Heber C. Kimball

P-Ezra Taft Benson - great-grandson of Ezra T. Benson

-Mark E. Petersen

-Matthew Cowley - son of Matthias F. Cowley

-Henry D. Moyle

-Delbert L.Stapley

-Marion G. Romney

-LeGrand Richards - son of George F. Richards, grandson of Franklin D. Richards

-Adam S. Bennion

-Richard L. Evans

-George Q. Morris

-Hugh B. Brown

P-Howard W. Hunter

P-Gordon B. Hinckley - nephew of Alonzo A. Hinckley

-N. Eldon Tanner

P-Thomas S. Monson

-Alvin R. Dyer

-Boyd K. Packer

-Marvin J. Ashton

-Bruce R. McConkie - son-in-law of Joseph Fielding Smith

-David B. Haight

-L. Tom Perry

-James E. Faust - great-great grandson of Amasa Lyman

-Neal A. Maxwell

-Russell M. Nelson

-Dallin H. Oaks

-M. Russell Ballard - grandson of Melvin J. Ballard and Hyrum M. Smith, great-grandson of Joseph F. Smith, great-great-grandson of Hyrum Smith

-Joseph B. Wirthlin - first cousin of Gordon B. Hinckley

-Richard G. Scott

-Robert D. Hales

-Jeffrey R. Holland - great-great grandson of George Q. Cannon

-Henry B. Eyring - nephew (by marriage) to Spencer W. Kimball, third cousin to Marion G. Romney

-Dieter F. Uchtdorf

-David A. Bednar

-Quentin L. Cook - great-great grandson of Heber C. Kimball

-D. Todd Christofferson

-Neil L. Anderson

Brigham Young called three of his sons to be Apostles while he was Prophet. One of them resigned from the Quorum of 12 when he was accused of misusing church funds, and another died before Young.  John Taylor called one of his sons, who was later excommunicated for refusing to discontinue polygamy.  Wilford Woodruff called one of his sons, but he died from smallpox at age 31.  Joseph F. Smith called two of his sons, one being Joseph Fielding Smith.  Joseph F. Smith was also the last Prophet to call one of his relatives to be an Apostle.

(I find the relations fascinating. I'm the great-great-great grandson of Amasa Lyman, and my wife's the great-great-great granddaughter of Jedidiah M. Grant.)