Her elder brothers left no surviving issue on their deaths which enabled her to enjoy and help to pass on to her descendants the key family settlement properties: Helmingham Hall and Ham House in England.

She and her younger sister, Jane, were educated at Mrs Holt's School for Girls in South Audley Street, Mayfair.

The couple lived most of their 27-year-marriage, ended by his death in 1792, at Ham House, spending time at the other senior Tollemache family home of Helmingham Hall in Suffolk.

[5] Louisa was a notable patron of John Constable, entertaining him at Helmingham, Ham House and London residences at Pall Mall and in Piccadilly.

[6] Others to derive works from Hoppner, Lawrence and Reynolds portraits of Louisa include Henry Bone, Charles Knight and Richard Smythe.

She was succeeded by her grandson, Lionel Tollemache, 8th Earl of Dysart, son of William, Lord Huntingtower.