His elder son took the courtesy title , Earl of Eltham .
On 16 July 1917 , Francis 's eldest son , Adolphus , was created Marquess of Cambridge , Earl of Eltham , and Viscount Northallerton in the peerage of the United Kingdom .
Francis ' elder son took the courtesy title Earl of Eltham     Eltham .
On 16 July 1917 , Francis 's eldest son , Adolphus , was created Marquess of Cambridge , Earl of Eltham , and Viscount Northallerton in the peerage of the United Kingdom .