Chancellor was born in Richmond, London, England, the daughter of the Hon. Mary Alice Jolliffe (daughter of William Jolliffe, 4th Baron Hylton) and John Paget Chancellor. Through her mother's mother, Lady Perdita Rose Mary Asquith, Chancellor is the great-granddaughter of Raymond Asquith and the great-great-granddaughter of Prime Minister H. H. Asquith,[1] and through her father, she is the great-great-granddaughter of the 12th Earl of Winchilsea and Nottingham (a descendant of Thomas Cecil, 1st