Florence Ada Keynes (née Brown; 10 March 1861 – 13 February 1958) was an English author, historian and politician.

Keynes was an early graduate of Newnham College, Cambridge[1] where her contemporaries included the economist Mary Marshall.

In 1950, she published a memoir, Gathering up the threads (W Heffer & Son Ltd, 1950), in which she discusses her ancestors along with the childhoods of her children John Maynard, Margaret and Geoffrey.

John Brown of Bunyan's Chapel, Bedford, and schoolteacher Ada Haydon, née Ford (1837–1929).

[5] Her brother Sir Walter Langdon-Brown was the Regius Professor of Physic (medicine) at the University of Cambridge.