| Honorific-Prefix: | Sir |
| John Josiah Guest | |
| Honorific-Suffix: | Bt FRS |
| Office: | Member of Parliament for Merthyr Tydfil |
| Term Start: | 1832 |
| Term End: | 1852 |
| Predecessor: | Office created |
| Successor: | Henry Bruce |
| Spouse: | Maria Rankin Lady Charlotte Bertie |
| Children: |
|
| Father: | Thomas Guest |
| Mother: | Jemima Revel Phillips |
| Birth Name: | Josiah John Guest |
| Birth Date: | 2 February 1785 |
| Birth Place: | Dowlais, Merthyr Tydfil, Wales |
| Resting Place: | St John's Church, Dowlais |
| Occupation: | Businessman |
Sir Josiah John Guest, 1st Baronet (2 February 1785 – 26 November 1852), known as John Josiah Guest, was a British engineer, entrepreneur and politician.
Guest was born on 2 February 1785 in Dowlais, Merthyr Tydfil, Wales. He was the son of Thomas Guest (d. 1807), a partner in the Dowlais Iron Company, and Jemima Revel Phillips. Guest was educated at Bridgnorth Grammar School and Monmouth School.
After attending school, he learned the trade of ironmaking in his father's foundry at the hands of the works manager, John Evans. Guest was renowned for his ability to roll a bar of steel or cut a tram of coal as well as any of his father's workmen.[1] Upon his father's death in 1807, Guest inherited his father's share of the company and developed the business, becoming sole owner of the works in 1815. By the time of his death in 1852, the Dowlais Iron Company had become the largest producer of iron in the world.
Guest was elected in 1825 as Member of Parliament for Honiton, Devon, holding the seat until the 1831 general election during the Reform Crisis. In 1832 he became the first MP for Merthyr Tydfil as a Whig,[2] and in 1837 he launched the campaign to have the town incorporated.[3]
In 1838, Guest was created a baronet, of Dowlais in the County of Glamorgan.[2] After his death in 1852, Guest was succeeded by his eldest son, who was elevated to the peerage in 1880 as Baron Wimborne, of Canford Magna in the County of Dorset, on Disraeli's initiative.
His public works included a school at Dowlais, designed by Sir Charles Barry. Guest was a Fellow of the Royal Society and a Member of the Institution of Civil Engineers. He was the first chairman of the Taff Vale Railway.[2]
In August 1840, Guest was appointed Master of Loyal Cambrian Lodge, No. 110 in Merthyr Tydfil.[4]
On 11 March 1817, Guest married Maria Rankin but their marriage was short-lived, Maria dying just nine months later in January 1818. On 29 July 1833, he subsequently married Lady Charlotte Elizabeth Bertie (1812–1895), daughter of Albemarle Bertie, 9th Earl of Lindsey.
Together, they had five sons and five daughters, including:
Guest died in 1852 and was buried in an iron coffin under a red granite slab in the local St John's Church, which had been built for him in 1827.[7]
After his death, his widow married Charles Schreiber (1826–1884) in 1855.[5] Schreiber was an academic who had been Ivor's tutor in 1852. He was known for being a fine arts collector and Conservative Party politician who sat in the House of Commons between 1865 and 1884.
See main article: Guest family. Among his many grandchildren were: Edward Ponsonby, the 8th Earl of Bessborough, brothers Granville (1867–1942) and Montague Eliot (1870–1960), who became the 7th and 8th Earls of St Germans, respectively.[8] There was also Frances Guest (1869–1957), known as Lady Chelmsford, who married Frederic Thesiger, 1st Viscount Chelmsford, who served as Viceroy of India, Ivor Churchill Guest (1873–1939), who became 1st Viscount Wimborne, Christian Henry Charles Guest (1874–1957), a Liberal Member of Parliament "MP", Frederick "Freddie" Edward Guest (1875–1937), another Liberal MP, and Oscar Montague Guest (1888–1958), who was both a Liberal, and later, a Conservative MP.[6]