The Guest family are a British family of the 18th, 19th, 20th, and 21st centuries who, among other things built a huge industrial business in the Dowlais Iron Company and later in Guest, Keen and Nettlefolds.
John Guest (1722-1785/25 November 1787) was a brewer, farmer and coal merchant in Broseley, Shropshire. He collaborated with Isaac Wilkinson in starting the Plymouth Ironworks in 1763 and there came to the attention of Thomas Lewis and the other Dowlais partners. He moved to Dowlais and was appointed manager of the works on 30 April 1767. He built his first house at Morlais Brook, Gellifaelog but, isolated from his family, became a "lonely and melancholy man". By 1767, Guest had moved most of his family to Dowlais. His children were:
Thomas Guest (died 1807) continued his father's work at Dowlais. He married Jemima Revel Phillips of Shifnal, Shropshire. They had three daughters and two sons:
Thomas did much to modernise production at Dowlais, employing several of his relatives, including:
John Josiah Guest (1785–1852) married:
Ivor Bertie Guest, 1st Baron Wimborne (1835–1914), married Lady Cornelia Henrietta Maria Spencer-Churchill (1847–1927), daughter of John Spencer-Churchill, 7th Duke of Marlborough, aunt of Sir Winston Churchill. They had four daughters and five sons:
Ivor Churchill married Alice Katherine Sibell Grosvenor, daughter of Robert Wellesley Grosvenor, 2nd Baron Ebury and they had two daughters and one son:
Frederick married Amy Phipps (1873–1959), daughter of American industrialist Henry Phipps. The couple had two sons and a daughter all of whom eventually emigrated to the United States.