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Her maternal grandparents were Edward IV of England and Elizabeth Woodville. Margaret was a younger sister of Henry Courtenay, 1st Marquess of Exeter. Their maternal first cousins included among others Arthur, Prince of Wales, Margaret Tudor, queen of Scotland, Henry VIII of England, and Mary Tudor, queen consort of France.
Local tradition at Devon mentioned her choking on a fishbone at Holcombe in 1512.
An inscription on her tomb would seem to confirm this. However, there is information of her still living in Richmond after that date.
Which seems to be the last record mentioning her alive. Her husband became Earl of Worcester in 1526.
Margaret seems to have died in the 1520s but no more specific date is known.
Although many sources say Margaret and Somerset had no children she was probably the mother of Lady Lucy Somerset (1524-1523 February 1583).
