Countess Charlotte Julia von Leyden was born in Munich in 1843.

She met Sir Rowland Blennerhassett, 4th Baronet in 1870 and married him on 9 June of the same year.

The new Lady Blennerhassett took to writing, and her most noted work was a biography of Madame de Staël.

After this she wrote a number of other biographies including one of Mary, Queen of Scots,[2] and two chapters for Volume X of The Cambridge Modern History, published in 1907.

Her children included Sir Arthur Charles Francis Bernard Blennerhassett, 5th Baronet, and Marie Galway.