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((Short description|British politician and naturalist (1778–1855)))
((Use dmy dates|date=February 2017))
((Use British English|date=February 2017))
((more citations needed|date=March 2009))((Infobox scientist
| image             = Lewis Weston Dillwyn Hayter.jpg
| birth_name        = <!-- if different from "name" -->
| birth_date        = ((birth date |1778|08|21 | df=yes))
| birth_place       = [[Walthamstow]], Essex, England
| death_date        = ((death date and age |1855|08|31|1778|08|21 | df=yes))
| death_place       = [[Sketty Hall]], near [[Swansea]], Wales
| fields            = Porcelain manufacturer, naturalist, Member of Parliament
| workplaces        = 
| patrons           = 
| education         = 
| alma_mater        = 
| thesis_title      = <!--(or  | thesis1_title =  and  | thesis2_title = )-->
| thesis_url        = <!--(or  | thesis1_url  =   and  | thesis2_url  =  )-->
| thesis_year       = <!--(or  | thesis1_year =   and  | thesis2_year =  )-->
| doctoral_advisor  = <!--(or  | doctoral_advisors = )-->
| academic_advisors = 
| doctoral_students = 
| notable_students  = 
| known_for         = ''The British Confervae''
| influences        = 
| influenced        = 
| awards            = 
| author_abbrev_bot = '''Dillwyn'''
| author_abbrev_zoo = 
| spouse            = Mary Adams <!--Llewelyn-->
| partner           = <!--(or | partners = )-->
| children          = Six, including [[John Dillwyn Llewelyn]], [[Lewis Llewelyn Dillwyn]], [[Mary Dillwyn]], Suzanna
| parents           =
| father            = [[William Dillwyn]]
| mother            = Sarah Dillwyn (née Weston)
| relatives         =
))
'''Lewis Weston Dillwyn''', FRS<ref>((Cite web|url=https://collections.royalsociety.org/DServe.exe?dsqIni=Dserve.ini&dsqApp=Archive&dsqDb=Catalog&dsqSearch=RefNo==%27EC/1803/05%27&dsqCmd=Show.tcl|title=DServe Archive Catalog Show|website=collections.royalsociety.org|access-date=2019-04-23))</ref> (21 August 1778 – 31 August 1855) was a British porcelain manufacturer, naturalist and [[Whigs (British political party)|Whig]] [[Member of Parliament (United Kingdom)|Member of Parliament]] (MP).

==Biography==
He was born in [[Walthamstow]], Essex, the eldest son of [[William Dillwyn]] (1743–1824) and Sarah Dillwyn (née Weston). His father, a [[Pennsylvania]]n [[Quaker]] had returned to Britain in 1777 during [[Philadelphia]]'s worst period in the [[American War of Independence]] and settled at [[Higham Lodge]], Walthamstow, Essex, UK. William Dillwyn was a vociferous anti-slavery campaigner and toured England and South Wales in his work for the [[Anti-Slavery Committee]]. William Dillwyn was related to [[George Haynes (businessman)|George Haynes]] through the [[Emlen Physick Estate#History  | Emlen and Physick]] families in Philadelphia and it is likely that the opportunity to buy the  [[Cambrian Pottery]] in [[Swansea]], Wales, from Haynes came about through these family connections in America.

William's letters to his daughter Suzanna are held by the [[Library Company of Philadelphia]] and stored at the [[Historical Society of Pennsylvania]]. These letters show that the factory was bought by William to keep Lewis active while the latter was suffering from [[gout]]. The highlight of this period of production of Swansea Pottery was the opening by Lewis Weston Dillwyn and George Haynes of the Cambrian Company, the Swansea Potteries London Warehouse on Fleet Street which operated between 1806 and 1807.<ref>See The Cambrian Company, Swansea Pottery In London 1806-1808, Jonathan Gray 2012</ref> In 1814 the pottery took over the workforce of the [[Nantgarw Pottery]] and began to make [[porcelain]].

Lewis Weston Dillwyn however was also renowned for his published works on [[botany]] and [[conchology]], including his 1809 work ''[[The British Confervae]]'', an illustrated study of British freshwater algae. Dillwyn is credited with discovering several [[species]] of the [[Conferva]] [[genus]]. Among the botanical illustrators of ''The British Confervae'' are the artists [[William Jackson Hooker]], [[Ellen Hutchins]] and [[William Weston Young]]. He was elected in 1804 as a [[Fellow of the Royal Society]].

In 1817 he temporarily retired from the pottery. In 1818 he became [[High Sheriff of Glamorgan]] and was elected to the First Reformed Parliament in 1834 as MP for Glamorganshire. He bought [[Sketty Hall]] near Swansea and was elected Mayor of Swansea in 1839.<ref>((Cite web|url=http://thepeerage.com/p37112.htm|title = Person Page))</ref> Dillwyn was also one of the founders of the Royal Institution of South Wales and its first President, and in 1840 he published a short history of Swansea.
[[File:Lewis Weston Dillwyn. Lithograph by E. U. Eddis (cropped).jpg |thumb|1833 lithograph portrait by [[Eden Upton Eddis]]]]
He married Mary Adams, the daughter of Colonel [[John Llewelyn (colonel)|John Llewelyn]] of Penllergaer, Llangyfelach in 1807. They had six children, including the noted photographer [[John Dillwyn Llewelyn]] (1810–1882), MP for Swansea [[Lewis Llewelyn Dillwyn]] (1814-1892) and pioneering female photographer [[Mary Dillwyn]] (1816-1906). His granddaughters by his son Lewis were the novelist and industrialist [[Amy Dillwyn]], and [[lepidopterist]] [[Mary De la Beche Nicholl]]. His granddaughter by John was the Welsh astronomer and pioneer in scientific photography [[Thereza Dillwyn Llewelyn]].<ref>((Cite web|title=Dictionary of Welsh Biography|url=https://biography.wales/article/s12-DILL-AMY-1845#?c=0&m=0&s=0&cv=24&manifest=https%3A%2F%2Fdamsssl.llgc.org.uk%2Fiiif%2F2.0%2F4716756%2Fmanifest.json&xywh=1904%2C2247%2C496%2C428|last=Bohata|first=Kirsti))</ref>

He died in Sketty Hall, Swansea, in 1855.

((botanist|Dillwyn|Dillwyn, Lew)).

==Honours==
He is honoured in the names of several species including, ''[[Dillwynella]]'' which is a [[genus]] of [[sea snail]]s, [[marine (ocean)|marine]] [[gastropod]] [[mollusk]]s in the [[family (biology)|family]] [[Skeneidae]] named by Dall in 1889.<ref name="WoRMS">((WRMS species|413477|''Dillwynella'' ||6 October 2011))</ref> ''[[Dillwynia]]'', which is a genus of about 20 species of flowering plants in the family [[Fabaceae]], and is [[endemic]] to Australia, named by [[Sm.]] in 1805.<ref>((cite web|title=''Dillwynia''|url= https://biodiversity.org.au/nsl/services/apc-format/display/105354|publisher=Australian Plant Census|access-date=15 May 2021))</ref>

==Taxa==
Taxa named by Dillwyn include:
* ''[[Lithopoma gibberosa]]'', a species of [[sea snail]]

==See also==
* ''[[Dillwyn v Llewelyn]]'', a legal case between his sons concerning his estate

== References ==
((reflist))
* [http://thepeerage.com/p37112.htm ThePeerage.com]
* [https://web.archive.org/web/20110720045712/http://auden.stanford.edu/cgi-bin/auden/individual.php?pid=I9739&ged=auden-bicknell.ged Biography]((Full citation needed|date=November 2014))

==Further reading==
((DNB poster|Dillwyn, Lewis Weston|Lewis Weston Dillwyn))
* A. R. Walker, 'The Dillwyns as naturalists: Lewis Weston Dillwyn (1778–1855)', in ''[[Minerva (magazine)|Minerva]] (Journal of Swansea History)''; 11, p.&nbsp;20-42.

((s-start))
((s-par|uk))
((succession box | title=[[Member of Parliament (United Kingdom)|Member of Parliament]] for [[Glamorganshire (UK Parliament constituency)|Glamorganshire]]| years=1832–1837 | before=[[Sir Christopher Cole]] | after=[[Edwin Wyndham-Quin, 3rd Earl of Dunraven and Mount-Earl|Edwin Wyndham-Quin]]))
((s-end))

((Authority control))

((DEFAULTSORT:Dillwyn, Lewis Weston))
[[Category:1778 births]]
[[Category:1855 deaths]]
[[Category:British industrialists]]
[[Category:British Quakers]]
[[Category:Conchologists]]
[[Category:Teuthologists]]
[[Category:Ceramics manufacturers of Wales]]
[[Category:High Sheriffs of Glamorgan]]
[[Category:Mayors of Swansea]]
[[Category:Whig (British political party) MPs for Welsh 
constituencies]]
[[Category:Fellows of the Royal Society]]
[[Category:Fellows of the Linnean Society of London]]
[[Category:UK MPs 1832–1835]]
[[Category:UK MPs 1835–1837]]
[[Category:Dillwyn family]]

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