Ada Ellen Bayly (25 March 1857 – 8 February 1903), also known as Edna Lyall, was an English novelist, who "supported the women's suffrage movement from an early age.

Early in life she lost both her parents, so that she spent her youth with an uncle in Surrey and in a Brighton private school.

She seems to have spent her adult life living with her two married sisters and her brother, a clergyman in Bosbury, Herefordshire.

In 1879, she published her first novel, Won by Waiting, under the pseudonym "Edna Lyall" (apparently derived from transposing letters from Ada Ellen Bayly).

Her historical novel In the Golden Days was the last book read to John Ruskin on his deathbed;[3] while Hope the Hermit was a bestseller set in the Lake District and later an inspiration for Hugh Walpole's Rogue Herries.