William Byron, 4th Baron Byron William Byron, 4th Baron Byron William Byron, 4th Baron Byron (4 January 1669/70 – 8 August 1736) was an English nobleman, politician, peer, and Gentleman of the Bedchamber to Prince George of Denmark. Byron was the son of William Byron, 3rd Baron Byron and the Hon. Elizabeth Chaworth. He succeeded to the title of 4th Baron Byron in 1695 upon the death of his father. Lord Byron died on 8 August 1736, and was succeeded by his fourth (but oldest surviving) son William Byron, 5th Baron Byron (born 1722). Lord Byron married Lady Mary Egerton, daughter of John Egerton, 3rd
Lord Byron Nottingham, Newstead Abbey." Augusta Leigh's child, Elizabeth Medora Leigh, born 1814, was very likely fathered by Byron, who was Augusta's half-brother. Byron had a child, The Hon. Augusta Ada Byron ("Ada", later Countess of Lovelace), in 1815, by his wife Annabella Byron, Lady Byron ("née" Anne Isabella Milbanke, or "Annabella"), later Lady Wentworth. Ada Lovelace, notable in her own right, collaborated with Charles Babbage on the analytical engine, a predecessor to modern computers. She is recognised as the world's first computer programmer. He also had an illegitimate child in 1817, Clara Allegra Byron, with Claire Clairmont, stepsister of Mary Shelley