Lady Katherine Grey
Member of the House of Tudor
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Katherine Seymour, Countess of Hertford was a younger sister of Lady Jane Grey.
A granddaughter of Henry VIII's sister Mary, she emerged as a prospective successor to her cousin, Elizabeth I of England, before incurring Queen Elizabeth's wrath by... Wikipedia
Born: August 25, 1540, Bradgate Park, United Kingdom
Died: January 26, 1568 (age 27 years), Cockfield Hall, Yoxford, United Kingdom
Children: Edward Seymour, Lord Beauchamp and Thomas Seymour
Spouse: Edward Seymour, 1st Earl of Hertford (m. 1560–1562) and Henry Herbert, 2nd Earl of Pembroke (m. 1553–1554)
Siblings: Lady Mary Grey and Lady Jane Grey