William Praed (24 June 1747 – 9 October 1833)   was an English businessman, banker, and politician who sat in the House of Commons from 1774 to 1808.
He is not to be confused with his first cousin of the same name, William Mackworth Praed, serjeant-at-law (1756–1835) and revising barrister for Bath  who was the father of Winthrop Mackworth Praed.
He was the oldest son of Humphrey Mackworth Praed (c. 1718–1803) of the manor of Trevethoe, near St Ives in Cornwall. His father was a Member of Parliament for St Ives and then for Cornwall. His mother Mary was a daughter of William Forester, the MP for Wenlock. He was educated at Eton College and at Magdalen College, Oxford. 
In 1778, he married Elizabeth Tyringham, daughter of the banker and MP Barnaby Backwell, of Tyringham in Buckinghamshire. They had ten children.
A partner in his family's banks in Cornwall, Praed also founded Praed's & Co in Fleet Street, London.
His family mostly controlled the borough of St Ives, which elected him to the House of Commons at the 1774 general election. An election petition was lodged alleging various forms of corruption, and Praed's election was declared void. He won the resulting by-election, and thereafter spent enough money to secure control of the borough until 1802, when he sold one of the seats.
Having already built a new country seat at Tyringham Hall in Buckinghamshire, he sold Trevethoe manor, and his interest in Cornwall waned. In 1806 he sold the second seat, and secured election at Banbury, where his money had won over the corporation. That election was voided on petition, and Praed lost the resulting by-election; he never returned to Parliament. 
Praed's business interests were a higher priority than parliamentary affairs, and he was particularly focused on the Grand Junction Canal, of which he was chairman. He steered through Parliament the bill which authorised its construction, and Praed Street in Paddington (near the canal's Paddington Basin) is named after him. 
He died in October 1833 and was buried in Tyringham Church with a monument carved by William Behnes. 
Winthrop Mackworth Praed —typically written as W. Mackworth Praed—was an English politician and poet.
St Ives is a parliamentary constituency covering the western end of Cornwall and the Isles of Scilly. The constituency has been represented in the House of Commons of the UK Parliament since 2015 by Derek Thomas, a Conservative MP.
Praed Street is a street in Paddington, west London, in the City of Westminster, most notable for being the location of London Paddington station. It runs south-westerly, straight from Edgware Road to Craven Road, Spring Street and Eastbourne Terrace.
Cornwall is a former county constituency covering the county of Cornwall, in the South West of England. It was a constituency of the House of Commons of England then of the House of Commons of Great Britain from 1707 to 1800 and of the House of Commons of the United Kingdom from 1801 to 1832. It was represented by two Knights of the Shire, elected by the bloc vote system.
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