His younger brother, Sir Richard, was an officer in the Royalist Army during the Civil War but was shunned by the court after the Restoration for working as a double agent for Oliver Cromwell during the Interregnum.
[7] In 1660, Willys was proposed as one of the Knights of the Royal Oak, an intended order of knighthood to be bestowed as a reward to supporters of Charles II of England; it was decided instead to institute a day of celebration, as it was thought that the establishment of the new order might stir dispute.
The list of prospective knights included the valuation of their property; it was estimated that Willys's Fen Ditton estates were worth £1000 a year.
She, who was born at her maternal grandfather's house, at Markshall, county Essex, died on 20 October 1685, aged 75.
His son and heir, Sir John Willys, 2nd Baronet (c. 1635 – 1704), succeeded to the baronetcy on the death of his father in 1701.