 Penn Assheton Curzon (the eldest son of Assheton Curzon, 1st Viscount Curzon and wife Esther Hanmer), and wife Sophia Howe, "suo jure" Baroness Howe (the eldest daughter of Richard Howe, 1st Earl Howe (of the first creation), and wife Mary Hartop).As his father predeceased his own father, Curzon inherited his grandfather's viscountcy and in 1820.He took the additional name of Howe by Royal licence a year later and was created Earl Howe (a revival of the title previously held by his maternal grandfather) that year.