Lady Louisa Bertie, married Thomas Bludworth in 1736
Lord Willougby inherited the Earldom of Lindsey in 1701, and was invested a Privy Counsellor one month later; along with the Earldom of Lindsey, he also inherited the offices of Lord Great Chamberlain and Lord Lieutenant of Lincolnshire, both of which he would hold until his death and would pass onto his son, the 2nd Duke of Ancaster and Kesteven. Lord Lindsey, as he was now styled, was then created Marquess of Lindsey in 1706, and was finally created Duke of Ancaster and Kesteven in 1715 (that year, he also served temporarily as a Lord Justice). He would die eight years later, an established but relatively unheralded statesman, at the age of 62.