John Josiah Guest

Sir
John Josiah Guest
Bt FRS
Sir John Josiah Guest Bt FRS
Member of Parliament for Merthyr Tydfil
	In office; 1832–1852
Preceded by	Office created
Succeeded by	Henry Bruce
Personal details
Born	Josiah John Guest; 2 February 1785; Dowlais, Merthyr Tydfil, Wales
Died	26 November 1852 (aged 67)
Resting place	St John's Church, Dowlais
Spouse(s)	Maria Rankin; Lady Charlotte Bertie
Children	Charlotte Maria Du Cane; Ivor Bertie Guest, 1st Baron Wimborne; Katharine Gwladys Alderson; Thomas Merthyr Guest; Montague John Guest; Augustus Frederick Guest; Arthur Edward Guest; Mary Enid Evelyn, Lady Layard; Constance Rhiannon Eliot; Blanche Vere Ponsonby, Countess of Bessborough;
Parents	Thomas Guest (father); Jemima Revel Phillips (mother);
Occupation	Businessman

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Sir Josiah John Guest, 1st Baronet (2 February 1785 – 26 November 1852), known as John Josiah Guest, was a British engineer, entrepreneur and politician.