Catherine Carey Francis and Lady Knollys produced a number of offspring who survived to maturity. Of the children listed, only the last, Dudley, is known to have died in infancy: The possibility that Catherine, and perhaps her brother Henry, were illegitimate children of Henry VIII, appears in many works of fiction, including Philippa Gregory's "The Other Boleyn Girl". Catherine Carey is also a character in Gregory's "The Boleyn Inheritance", where she is sent to the royal court during the time of Queens Anne of Cleves and Catherine Howard, and in "The Virgin's Lover", where, as the mother of the seventeen-year-old Lettice Knollys,
Catherine Howard miniatures only exist for queens at this period. There are no other plausible likenesses of her to compare to. Both versions have long been documented as of Catherine Howard, since 1736 for the Buccleuch version and 1739 (or at least the 1840s) for the Windsor version. A Holbein sketch (above) is also traditionally identified as being of Catherine Howard, but this is widely disputed. The contemporary Hans Holbein the Younger portrait of a woman in black (Toledo Museum of Art), was identified by Sir Lionel Cust in 1909 as Catherine Two copies of Holbein's original are extant: one at Hever