Joshua Grigby (c. 1731 – 26 December 1798) was a Member of Parliament for Suffolk from 1784 to 1790.Mary M. Drummond, "Grigby, Joshua (?1731–98), of Drinkstone, Suff.", The History of Parliament.
He was the son of Joshua Grigby, a solicitor, and Mary Tubby,Augustine Page, A Supplement to the Suffolk Traveller (Ipswich, 1844), 712–13. and was educated at Clare College, Cambridge.John Venn and J. A. Venn, Alumni Cantabrigienses, 10 vols. (Cambridge, 1922–54), part 1, 2:268. His grandfather, also Joshua Grigby, was lord of the manor of Gonvile Manor, Wymondham, Norfolk.The Gentleman's Magazine, 99(Jan–Jun 1829):374.
His father was town clerk of Bury St Edmunds, and after gaining a law degree at Cambridge University, Joshua followed him in this role.
Grigby married, in 1756, Jane Bird, daughter of Thomas Bird and Elizabeth Martyn of Coventry.Edward J. Davies, "Some Connections of the Birds of Warwickshire", The Genealogist, 26(2012):58–76. He died on 26 December 1798, aged sixty-seven, and was buried at Drinkstone.
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