There have been two baronetcies granted to the Willyses of Fen Ditton, both in the Baronetage of England. The Willys Baronetcy, of Fen Ditton in Cambridgeshire, was first created in the Baronetage of England on 15 December 1641 for Thomas Willys, son and heir of Richard Willys, of Fen Ditton and Horningsey, Cambridgeshire, by Jane, daughter and heir of William Henmarsh, of Balls, in Ware, Hertfordshire. Richard's brother, Thomas was Clerk of the Crown in Chancery. Sir Richard Willis, the younger brother of Thomas, with the same parentage, was also created Baronet of Fen Ditton. Sir Richard who fought as an officer in the Royalist army during the English Civil War, also worked as a double-agent for Oliver Cromwell during the Interregnum and was banned from court following the Restoration. Sir Richard's son Sir Thomas Fox Willis died in 1701 without issue, having been born, according to the medical notes made by his grandfather, Thomas Foxe, 'bereft of his wits'; this baronetcy therefore became extinct. The baronetcy granted to Thomas Willys passed to his son John Willys, then to his grandson Thomas Willys, but his great-grandson, also Thomas Willys, died without issue in 1725; the baronetcy passed to another Thomas Willys, the 4th Baronet's first cousin once removed. On his death in 1726 his younger brother William inherited the title, but died childless in 1732, making the baronetcy extinct. Arthur J. Willis, in 'Genealogy for Beginners', when researching his unrelated Willis ancestors, visited the College of Arms regarding a potential link to the baronetical Willyses, and observed: 'I was told that the male line of the grandsons had died out, though there was a suggestion that the last member of the family, John, had refused the baronetcy because he was in trade and had gone North'. Looking at the Willis family pedigree in Burke's 'Extinct and Dormant Baronetcies', he concluded: 'This was interesting but curiously silent about the John, grandson of the first baronet, not giving as one would expect the record of his death, only saying that his father Robert died in 1692 "leaving an only child John"... it may be taken as fairly certain that full investigation was made at the time the baronetcy lapsed, but the vagueness did lend some colour to the story related by the College of Arms.' John Walpole Willis and his descendants descended from the Cambridgeshire Willys family through his grandfather Joseph Willis of Wakefield, Yorkshire. According to some sources- notwithstanding Arthur J. Willis's tentative conclusion in 'Genealogy for Beginners' as outlined above- this descent was via the "last member of the family" of baronets, John Willis, said to have been "in trade and... gone North", this family being descended from an individual of that name who settled at Wakefield, Yorkshire and established himself as a merchant. John Walpole Willis's father, Captain William Willis, was said to be "the direct descendant of Sir Thomas Willis, of Fen Ditton, Cambridgeshire, created a Baronet in 1641". The anatomist, neurologist and psychologist Thomas Willis was a kinsman of this line; his father, Thomas, the son of another Thomas Willis was the steward of Great Bedwyn, Wiltshire and owned a farm there. The 6th Baronet served as M.P. for Great Bedwyn from 1727–1732. Burke's 'A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland, 1834' details the relationship between the Willys baronets and the Willis Fleming family of North Stoneham Park that descended from Thomas Willis thus: 'The family of Willis claims descent from the eminent and ennobled family of Welles. Browne Willis, M.P., the celebrated antiquarian, was one of its members, and his descendants have assumed of late years the surname Fleming, for estates left to them in Hampshire, where they are now resident. In the reign of Charles II, Thomas Willis, of the Berkshire family of that name, and to which family a baronetcy was granted by King Charles I, settled in Lancashire and purchased estates in that county, which, together with others, are now in possession of Richard Willis, esq. of Halsnead Park.'. Browne Willis was the anatomist Thomas Willis's grandson. The Richard Willis in question was, like Thomas Willis, a descendant of John Willis of Harborough, Leicestershire, and so came to inherit the estates there.
