Family Relationship of

Sandra Day O'Connor

First Female U.S. Supreme Court Justice

26th Great-granddaughter to

King Louis VI

King of France

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King Louis VI

Adelaide de Savoy

Louis VII, King of France

Adèle of Champagne

Philip II Auguste, King of France

Isabella of Hainault

Louis VIII, King of France

Blanche of Castile

Robert I, Count of Artois

Matilda of Brabant

Blanche of Artois

Edmund Plantagenet

Henry Plantagenet

Maud de Chaworth

Joan of Lancaster

John de Mowbray

John de Mowbray

Elizabeth de Segrave

Eleanor de Mowbray

John de Welles

Eudo de Welles

Maud de Greystoke

Sir Lionel de Welles

Joan de Waterton

Cecily de Welles

Sir Robert Willoughby

Sir Christopher Willoughby

Margaret Jenney

Elizabeth Willoughby

Sir William Eure

Sir Ralph Eure

Margery Bowes

Anne Eure

Lancelot Mansfield

John Mansfield

Elizabeth - - - - - -

Elizabeth Mansfield

Rev. John Wilson

Mary Wilson

Rev. Samuel Danforth

Rev. Samuel Danforth

Mary Danforth

Jacob Barney

Silence Barney

Lettice Carlyle Cobb

Hollis Day

Henry Clay Day

Henry R. Day

Sandra Day O'Connor

U.S. Supreme Court Justice