Lady Joyce Culpepper Howard

Lady Joyce Culpepper was the daughter and heir of Sir Richard Culpepper. She
was married to Lord Edmund Howard the third son of Thomas Howard, the Third
Duke of England. Their Daughter was Katherine Howard, one of the ill fated
Queens of Henry VIII. She was beheaded in the Tower when she was accused of
being unfaithful to the King after they married. Another daughter, Margaret
Howard, married Sir Thomas Arundel, and they became protestants in the reign
of Henry VIII. In the next reign, that of Edward VI, Arundel was accused of
conspiracy and was beheaded and his property sequestered. They had one son,
Matthew, and this Matthew assumed his mother's name of Howard, as his own, was
temporarily under a cloud, but with Mary's accession to the Throne and Crown,
the Howard prestige was greater than ever. His great uncle, Thomas Howard was
Duke of Norfolk and Counsellor of State to Queen Mary. The use of Surnames
was not yet so fixed a habit but that a man might take one at his convenience,
and the asumption of the mother's name was a frequent occurrence.

Source: Notable Southern Families, see Howard Family by Burke, pages 100-119.
!Encyclopedia Americana, Vol 14, "Katherine Howard".