Speaker of the House of Commons (1728-1761)
lived at 20 Soho Square, Westminster, W1According to plaque #5.
"Arthur Onslow (1 October 1691 – 17 February 1768) was an English politician. He was the elder son of Foot Onslow (died 1710) and his wife Susannah....", according to Wikipedia. See full article for more.