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William Mackworth-Praed, later Mackworth-Praed of Trevethoe[1, 2, 3]
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1694 - 1752 (57 years)-
Name William Mackworth-Praed [3] Suffix later Mackworth-Praed of Trevethoe Birth 3 Nov 1694 [3] Gender Male Married 1715 (20 years) [3, 4] Stirnet - which isn't often wrong - says married 1715 Anne Slaney (dau of Robert Slaney of Rudge); History of Parliament says Humphrey's mother Martha daughter of John Praed... Name 1715 (20 years) [3] His change of name was the result of an arranged marriage, although the sources disagree on who his wife was. Colburn records that he married Martha, the daughter of John Praed MP, and took Praed's name on marriage.[3] However, Cruikshanks asserts that this deal fell through, and he married Ann Slaney, the daughter of a wealthy merchant from Bristol, in a deal between Sir Humphrey Mackworth and John Praed, by which half of Ann's dowry went to redeem Praed's debt, in return for which young William Mackworth took the name of Praed and was adopted as Praed's son and heir.[2] Married Abt 1717 (22 years) [3] reputedly married Martha about 1717; mother of Humphrey.... Death 1752 [3] Occupation 31 Oct 1717 (22 years) - manor of Lelant and Trevetho, Lelant, Cornwall 
- William was adopted as heir of his friend John Praed of Trevethoe [https://www.stirnet.com/genie/data/british/pp/pzmisc07.php#praed1]
John Praed of Trevethow (d 31.10.1717, MP for St. Ives)
a. Martha Praed
Commoners reports that "It is said, in Blore's History of Rutland, that Martha ... m. William Mackworth ... and that she was b. 1700, and d. 1799". However, BLG1952 (Mackworth-Praed formerly of Mickleham) suggests that John Praed settled Trevethoe on William Mackworth "in consideration of the assistance he had formerly received from the family of Mackworth".Abt 1720 (25 years) - Trevethoe(Trevethow), Trevethoe - At Mr. Praed’s death Mr. Mackworth came into possession, and having performed every engagement to the utmost of his power, he went to Penrose with an intention of consummating, so far as lay in his power, the final condition of his inheritance; he however not only did not succeed, but found some difficulty in escaping with his life.
The validity of the transfer of the property was ultimately disputed on the part of Miss Penrose; but at the trial an arrangement was made between the claimants.1733 (38 years) - manor of Lelant and Trevetho, Lelant, Cornwall - In 1733 he inherited from Praed the Trevethoe estate in Cornwall, which included the patronage of the parliamentary borough of St Ives, and at the 1734 general election he returned himself as Member of Parliament for St Ives. He did not stand again in 1741.[2] [3]1734-1740 (45 years) - [Office] MP St Ives, St Ives, Cornwall - In 1733 he inherited from Praed the Trevethoe estate in Cornwall, which included the patronage of the parliamentary borough of St Ives, and at the 1734 general election he returned himself as Member of Parliament for St Ives. He did not stand again in 1741.[2] [3]Association James Praed (Relationship: arrangement for lands in Lelant) Person ID I8937 AHP Last Modified 21 Jan 2026
Father Sir Humphrey Mackworth, b. Jan 1657 d. 1727 (Age 69 years) Relationship Birth Mother Mary Evans (dau of Sir Herbert Evans of Neath) Evans/MACKWORTH, b. Abt 1666 Relationship Birth Marriage 1686 Age at Marriage He : ~ 28 years and 11 months - She : ~ 20 years. Histories 
Sir Humphrey Mackworth b Jan 1657, knighted 1682 and heirs
William Mackworth-Praed, later Mackworth-Praed of Trevethoe
Colburn, Henry (1837). A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. Retrieved 21 Jan 2026 via Google BooksFamily ID F3792 Group Sheet | Family Chart
Family 1 Anne Slaney/PRAED, d of Robert Slaney of Rudge d. poss 1716 Marriage 1715 Type: reputedly married Anne Slaney (dau of Robert Slane Age at Marriage He : ~ 20 years and 1 month - She : ??. Children 1. Arabella Mackworth-Praed, dsp [Father: Birth] [Mother: Putative] Histories Sir Humphrey Mackworth b Jan 1657, knighted 1682 and heirs
William Mackworth-Praed, later Mackworth-Praed of Trevethoe
Colburn, Henry (1837). A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. Retrieved 21 Jan 2026 via Google BooksFamily ID F4379 Group Sheet | Family Chart Last Modified 21 Jan 2026
Family 2 Martha, d and h of John Praed, M.P., of Trevethoe Praed/PRAED, b. Abt 1700 Marriage Abt 1717 [4] Age at Marriage He : ~ 22 years and 1 month - She : ~ 17 years. Children + 1. Humphrey Mackworth-Praed, Esq; KZKN-VL9, b. 1718, Watling Street, Shropshire d. 6 Mar 1803 (Age 85 years) [Father: Birth] [Mother: Birth]2. Bulkley Mackworth-Praed, c. 12 Feb 1721 d. Jan 1780 (Age ~ 58 years) [Father: Birth] [Mother: Birth] + 3. William Mackworth-Praed, of Bitton Court, b. Abt 1723 bur. 6 Nov 1791 (Age ~ 68 years) [Father: Birth] [Mother: Putative] Histories Sir Humphrey Mackworth b Jan 1657, knighted 1682 and heirs
William Mackworth-Praed, later Mackworth-Praed of Trevethoe
Colburn, Henry (1837). A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. Retrieved 21 Jan 2026 via Google BooksFamily ID F2508 Group Sheet | Family Chart Last Modified 25 Apr 2023
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Event Map 
Occupation - William was adopted as heir of his friend John Praed of Trevethoe [https://www.stirnet.com/genie/data/british/pp/pzmisc07.php#praed1] John Praed of Trevethow (d 31.10.1717, MP for St. Ives) a. Martha Praed Commoners reports that "It is said, in Blore's History of Rutland, that Martha ... m. William Mackworth ... and that she was b. 1700, and d. 1799". However, BLG1952 (Mackworth-Praed formerly of Mickleham) suggests that John Praed settled Trevethoe on William Mackworth "in consideration of the assistance he had formerly received from the family of Mackworth". - 31 Oct 1717 (22 years) - manor of Lelant and Trevetho, Lelant, Cornwall 
Occupation - At Mr. Praed’s death Mr. Mackworth came into possession, and having performed every engagement to the utmost of his power, he went to Penrose with an intention of consummating, so far as lay in his power, the final condition of his inheritance; he however not only did not succeed, but found some difficulty in escaping with his life. The validity of the transfer of the property was ultimately disputed on the part of Miss Penrose; but at the trial an arrangement was made between the claimants. - Abt 1720 (25 years) - Trevethoe(Trevethow), Trevethoe Occupation - In 1733 he inherited from Praed the Trevethoe estate in Cornwall, which included the patronage of the parliamentary borough of St Ives, and at the 1734 general election he returned himself as Member of Parliament for St Ives. He did not stand again in 1741.[2] - 1733 (38 years) - manor of Lelant and Trevetho, Lelant, Cornwall 
Occupation - In 1733 he inherited from Praed the Trevethoe estate in Cornwall, which included the patronage of the parliamentary borough of St Ives, and at the 1734 general election he returned himself as Member of Parliament for St Ives. He did not stand again in 1741.[2] - 1734-1740 (45 years) - [Office] MP St Ives, St Ives, Cornwall = Link to Google Earth Pin Legend 
: Address
: Location
: City/Town
: County/Shire
: State/Province
: Country
: Not Set
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Histories William Praed, of Trevethow, gentleman, died in 1620 | Lake’s Parochial History—1868 
The Story Behind The Shot - The Heart of The Landscape
Tempest Photography News
2023-03-06The Manor of Lelant and Trevetho and The Manor of Trembethow
The Manor of Lelant and Trevetho...passed successively to Godolphin and Praed, now
represented by the Mackworth-Praeds
Manor of Saint Ives and Treloyhan was purchased from
Praed of Trevetho by Sir Christopher Hawkins, Bart., about the
year 1807Sir Humphrey Mackworth b Jan 1657, knighted 1682 and heirs
William Mackworth-Praed, later Mackworth-Praed of Trevethoe
Colburn, Henry (1837). A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. Retrieved 21 Jan 2026 via Google Books
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Sources - [S34] The History of Parliament, The History of Parliament, (The History of Parliament http://www.historyofparliamentonline.org/) (Reliability: 2).
Constituency
Dates
ST. IVES
1761 - 1768
CORNWALL
16 Dec. 1772 - 1774
Family and Education
b. ?1718, 1st s. of William Mackworth Praed, M.P., by Martha, da. and h. of John Praed, M.P., of Trevethoe, Cornw. educ. ?Trinity Hall, Camb. 1741; M. Temple 1739. m. 1 Jan. 1746, Mary, da. of William Forester, wid. of Sir Brian Broughton Delves, 4th Bt., M.P., 2s. 4da. suc. fa. 1752.
Offices Held
Biography
William Mackworth Praed was a brother of Herbert Mackworth senior, and took the name of Praed when he inherited the Praed estates. Both his father-in-law and he sat for St. Ives, and it was on the family interest and by agreement with Lord Buckinghamshire that Humphrey Mackworth Praed was returned in 1761
https://www.historyofparliamentonline.org/volume/1754-1790/member/mackworth-praed-humphrey-1718-1803 - [S51] Stirnet , Stirnet | Peter Barns-Graham, (stirnet.com | Peter Barns-Graham) (Reliability: 3).
William Mackworth, later Mackworth-Praed of Trevethoe (b 03.11.1694, d 1752)
William was adopted as the heir of his friend John Praed of Trevethoe.
m. (1715) Anne Slaney (dau of Robert Slaney of Rudge)
https://www.stirnet.com/genie/data/british/mm4ae/mackworth2.php - [S214] Google Books.
Sir Humphrey Mackworth, an eminent lawyer, b.
Jan. 1657, knighted at Whitehall, 15 Jan, 1682; who m.
Mary, dau. and heir of Sir Herbert Evans, of Neath, Glamor-
ganshire, by his wife, Anne, dau. and co-heiress of William
Morgan, Esq. of Penerig House, in the parish of Lian-
henog, co. of Monmouth; by this marriage he became
possessed of large estates in Glamorganshire and Mon-
mouthshire, (in the latter county, on the Pencrug estate, is
situated Glen Uske, the residence of the present Sir Digby
Mackworth ;) he had issue, three sons and two daus.,
Herbert, his heir.
Kingsmiill-Evans, b. 2 Oct. 1688, at Neath; m. and left
issue.
William, b. 3 Nov. 1691, who took the surname of Praed.
He m. Martha, dau. and heir of John Praed, Esq. of
Trevathow, co, Cornwall, and left, with a dau., Ara-
bella, who d. unm., three sons, viz.,
1 Humphrey Mackworth-Praed, of Trewathow, [Trevethoe]
M.P. for St. Ives; whom. in 1746, the widow of
Sir Brian Broughton Delves, Bart., and dan, of
William Forrester, Esq. of Watling Street, co,
Salop, and left, with other issue,
William Praed, Esq. of Tyringham, in Bucks, a
banker in London, and M.P. for St. Ives up to
1806 ; m. and had issue.
2 Bulkeley Mackworth-Praed, Esq., d.s. p.
3 William Mackworth-Praed, Esq., m. Susan Stokes,
and left issue, one son and three daus.,
William Mackworth - Praed, serjeant-at-law ;
m. and had issue.
Juliana, m. T..W. Shore, Esq.
Susan, m. T. Smith, Esq.
Arabel, m. John, Earl of Mayo.
https://books.google.co.uk/books?id=h_U8AQAAIAAJ&pg=PA674&redir_esc=y#v=onepage&q&f=false - [S51] Stirnet , Stirnet | Peter Barns-Graham, (stirnet.com | Peter Barns-Graham), 1715 (Reliability: 3).
Stirnet - which isn't often wrong - says married 1715 Anne Slaney (dau of Robert Slaney of Rudge); History of Parliament says Humphrey's mother Martha daughter of John Praed...
https://www.stirnet.com/genie/data/british/mm4ae/mackworth2.php
- [S34] The History of Parliament, The History of Parliament, (The History of Parliament http://www.historyofparliamentonline.org/) (Reliability: 2).