Edward VI  ( born Oct. 12, 1537 , London—died July 6, 1553 , London )  king of England and Ireland from 1547 to 1553.

Edward was King Henry VIII’s only legitimate son; his mother, Henry’s third wife, Jane Seymour, died 12 days after his birth. Although Edward has traditionally been viewed as a frail child who was never in good health, some recent authorities have maintained that until several years before his death he was a robust, athletically inclined youth. His tutors found him to be intellectually gifted, a precocious student of Greek, Latin, French, and theology. On Jan. 28, 1547, Henry VIII died and Edward succeeded to the throne.

Henry had decreed that during Edward’s minority the government was to be run by a council of regency; in fact, Edward’s uncle, Edward Seymour, duke of Somerset, wielded almost supreme power as regent, with the title of protector, until he was overthrown in 1549 by the unscrupulous John Dudley, earl of Warwick (soon to be duke of Northumberland). The young king was the mask behind which Northumberland controlled the government. The measures taken by both Somerset and Northumberland to consolidate the English Reformation, however, agreed with Edward’s own intense devotion to Protestantism.

In January 1553 Edward showed the first signs of tuberculosis, and by May it was evident that the disease would be fatal. Working with Northumberland, he determined to exclude his two half-sisters, Mary and Elizabeth, from the succession and to put Northumberland’s daughter-in-law, Lady Jane Grey, and her male heirs in direct line for the throne. As a result, a power struggle erupted after Edward’s death. Lady Jane Grey ruled for nine days (July 10–19, 1553) before she was overthrown by the more popular Mary I (reigned 1553–58).

Edward displayed a potential for effective administration, but many scholars have felt that, had he lived, his religious zeal and extreme obstinacy might have imprinted rigidity and narrowness a much firmer and more uncompromising Protestantism on the Church of England.