Family Relationship of

Gilbert de Clare

Magna Carta Surety

22nd Great-grandfather to

Sarah Ferguson

Duchess of York

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Gilbert de Clare

Isabel Marshal

Sir Richard de Clare

Maud de Lacy

Roese de Clare

Sir Roger de Mowbray

Sir John de Mowbray

Aline de Braiose

John de Mowbray

Joan of Lancaster

John de Mowbray

Elizabeth de Segrave

Sir Thomas Mowbray

Isabel Mowbray

Maurice Berkeley

Anne Berkeley

Eleanor Dennis

Katherine Lygon

Henry Folliott

Elizabeth Folliott

Col. Sir John Ponsonby

William Ponsonby

Mary Moore

Brabazon Ponsonby

Sarah Margetson

John Ponsonby

Elizabeth Cavendish

Frances Ponsonby

Cornelius O'Callaghan

Louisa O'Callaghan

William Cavendish

George Henry Cavendish

Louisa Lascelles

Susan Henrietta Cavendish

Henry Robert Brand

Margaret Brand

Algernon Francis Holford Ferguson

Andrew Henry Ferguson

Marian Louisa Montagu-Douglas-Scott

Ronald Ivor Ferguson

Susan Mary Wright

Sarah Ferguson

Duchess of York

Sarah Ferguson photo by Norbert Aepli ( CC BY 3.0)