Lady Jane Grey also known as The Nine Days' Queen, was an English noblewoman who was de facto monarch of England from 10 July until 19 July 1553 and was subsequently executed. A great-granddaughter of Henry VII

Henry VII of England

Henry VII was King of England and Lord of Ireland from his seizing the crown on 22 August 1485 until his death on 21 April 1509, as the first monarch of the House of Tudor....

 by his younger daughter Mary, Jane was a first-cousin-once-removed of Edward VI

Edward VI of England

Edward VI was the King of England and Ireland from 28 January 1547 until his death. He was crowned on 20 February at the age of nine. The son of Henry VIII and Jane Seymour, Edward was the third monarch of the Tudor dynasty and England's first monarch who was raised as a Protestant...

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In May 1553 Jane was married to Lord Guildford Dudley

Lord Guildford Dudley

Lord Guildford Dudley was the husband of Lady Jane Grey who, declared as his heir by King Edward VI, occupied the English throne from 6/10 July till 19 July 1553. Guildford Dudley enjoyed a humanist education and was married to Jane in a magnificent celebration about six weeks before...

, a younger son of Edward's chief minister, John Dudley, Duke of Northumberland.