She was the only child and heir of James Scudamore, 3rd Viscount Scudamore, bringing him the Viscounts Scudamore seat of Holme Lacy. Fitzroy added the Scudamore name to his own on 22 March 1749.
She was the sole child and beneficiary of James Scudamore, 3rd Viscount Scudamore, inheriting his title and seat at Holme Lacy. Fitzroy then combined the Scudamore name with his own in 1749.