Mary FitzRoy, Duchess of Richmond and Somerset, born Mary Howard, was a daughter-in-law of King Henry VIII of England, being the wife of his illegitimate son Henry FitzRoy, 1st Duke of Richmond and Somerset.

Henry VIII was King of England from 22 April 1509 until his death in 1547. Henry is known for his six marriages and his efforts to have his first marriage annulled. His disagreement with Pope Clement VII about such an annulment led Henry to initiate the English Reformation, separating the Church of England from papal authority. He appointed himself Supreme Head of the Church of England and dissolved convents and monasteries, for which he was excommunicated by the pope.