Naturalisation is the legal process by which a person changes their nationality.
For hundreds of years, foreign nationals living in the UK, and sometimes living abroad, have been able to attain British citizenship through naturalisation.
Search billions of historical records and family trees on Ancestry, including immigration records, passenger lists, naturalization records, census records, and other documents that can help trace your ancestors' journey.
Start your Ancestry free trialThe criteria and process have changed over the years but for successful applicants the end result has been the same: that person is granted the same legal rights and status of a natural-born British citizen.
Before 1844 naturalisation was granted only by a private act of parliament. The procedure was expensive and only a few could afford it. After 1844, right up to the present day, naturalisation has usually been granted by the Home Office.
Denizations & Naturalizations in England 1509-1603
Letters of denization and acts of naturalization for aliens in England, 1509-1603 by Page, William, 1861-1934. Huguenot Society of London

Abber, Denys, aged 49 years, fisherman, born in Scotland. Married to an English woman, has one child. In England 38 years. Suitor for Letters of Denization, 1542. (Cecil MSS., No. 279.)
Abby, John, of Wareham in the County of Kent, smith, born in Normandy. In England 20 years. Married to an English woman and has by her 2 children. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .) 11 July, 1544. ( Deniz . Roll, 36 Hen. 8 .)
Abee, John, shoemaker, born in Normandy, aged 43 years. In England 15 years, now dwells in the parish of Evershott in the County of Dorset. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .)
Abeleyn, John, bom in Andwerpe under the dominion of the Emperor. Dwelling “ at St. Katherin’s att the Towre.” In England 10 years “ and now of late is assured to an English woman.” 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .)
Abell, Hamond, Norman born. Dwelt in Devonshire 60 years. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen 8 .)
Abell, John, labourer, born at Bamesfeld in France. Married to an English woman. In England 19 years. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .)
Abercromy, James, clerk, from Scotland. 10 Feb., 1567. (Pat., 9 Eliz., p. 3, m. 39.)
Abercromy, Walter, from Scotland. 22 Jan., 1522. (Pat., 13 Hen. 8, p. 3, m. 19.)
Abraham, Martin, bom in Normandy, aged 50 years. In England 30 years. Married to an English woman and has by her 5 children. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .) 11 July, 1544. (Deniz. Roll, 36 Hen. 8 .)
Abraham, Nicholas, of Corffe Castell, in the County of Dorset, blacksmith, born in Normandy, aged 24 years. In England 16 years. Married to an English woman. 1 July, 1544. (Westm. Deniz. Roll, 36 Hen. 8 .)
Abroele, John, & Barbara, his wife. 10 Mar., 1552. (Pat., 6 Edw. 6 , p. 4, m. 1 .)
Abrowyler alias Coleyn, John, shoemaker. From the dominion of the Emperor. 26 Feb.,
Continue searching the list of names of aliens in England 1509-1603
Chancery: Original Letters Patent of Denization 1752-1830
This series consists of fifteen engrossed letters patent of denization, each with the great seal attached, and each supplying the new place of residence of each alien. Some of the documents also supply the alien’s former place of residence and occupation. Most of the denizations are in their original wooden boxes, and may have been left, unclaimed by the patentees, in the department of the Hanaper.
Order the full record for each alien listed below from National Archives UK
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| C 97/1 Christopher Ganer, formerly of Leipzig, Saxony C 97/1 Johannes Geib, formerly of Staudenheim, Germany C 97/1 John Schweitzer, formerly of Lam near Wetzlar, Solms-Braunfels C 97/1 John Joly, formerly of Chalon Surlaone [Châlon-sur-Saône], Burgundy, France C 97/1 John Kepp, formerly of Bremen, Germany C 97/1 John George Düppel, formerly of Frankfurt-am-Main, Germany C 97/1 John Wernicke, formerly of Leutzen, Prussia C 97/2 Johan Zoffany C 97/2 John George Schennerstedt C 97/2 George Christian Wilse C 97/2 Luke Wetton C 97/2 Charles Hinricks C 97/2 Philip King C 97/2 Laurence Tenner C 97/3 John Christopher Romer C 97/3 John Jobst van der Neunburg C 97/3 George Lark C 97/3 George Franck C 97/3 Isaac Ardesoif C 97/3 George Brucker C 97/3 John Mottier C 97/4 John Quinck C 97/4 John Briant C 97/4 Anthony Gibert C 97/4 Henry Feldman C 97/4 Peter Capreol C 97/4 Nicholas Garling C 97/4 John Hartman C 97/6 Sebastian Gottlob Kleinert C 97/6 Charles Frederick Abel C 97/6 Christopher Michael Seldenschlo C 97/6 John Ernst Grob C 97/6 John Wolrath Doorman C 97/6 John Daniel Richard C 97/6 John Daniel Saloman C 97/7 Bernard Diemel C 97/7 George Ernest Eller C 97/7 Henry Rimius C 97/7 Burkat Shudi C 97/7 David Regnier C 97/7 Rudolph Ladenberg C 97/7 Stephen Rougent C 97/8 Tobias Kleinert C 97/8 John Tax C 97/8 John Frederick Brandenburgh C 97/8 Jacob Richter C 97/8 Francis Albert de la Vaux C 97/8 Frederick Kuliff C 97/8 Christopher Winch | C 97/9 John Sommer C 97/9 John Miller C 97/9 Henry Seveeke C 97/9 Andrew Regnier C 97/9 Frederick Bund C 97/9 John Turquet, the Elder C 97/9 Oltman MüllerC 97/10 Valentine Auschentz C 97/10 Frederick Halm C 97/10 Nicholas Winkings C 97/10 Harman Samler C 97/10 Frederick William Sporman C 97/10 George Deichman C 97/10 Andrew Knies C 97/11 Arnold Michael Burmester C 97/11 Durs Egg C 97/11 John Christian Bowman C 97/11 Peter Storck C 97/11 Henry Hawes C 97/11 John Nicholaus Schneider C 97/11 Henry Ercks C 97/12 Peter Le Chevalier C 97/12 James Du Bisson C 97/12 David Zubre C 97/12 James Le Breton C 97/12 Henry Haverbeck C 97/12 Conrade Barrett C 97/12 Benedict Schaller C 97/13 John Christopher Hampp, formerly of Marbach, Würtemberg C 97/13 Anthony Flindt, formerly of Hamburg, Germany C 97/13 Maximilian Fischer, formerly of Chur, Grisons C 97/13 Christopher Hacdy, formerly of Stein Schenow, Bemmick Kanrich [Steinschënau Böhmisch Kamnitz], Bohemia C 97/13 Eleazar Isaks Kayser, formerly of Amsterdam, Holland C 97/13 Mark Wratislau, formerly of Weiskirchen near Olmültz, Austria C 97/13 Pierre Duval, formerly of Calais, France C 97/14 Rodolph Huguenin C 97/14 John Frederick Loofs C 97/14 Nicholas Ramus C 97/14 Lewis Pache C 97/14 Henry Perrot C 97/14 Jeremy De Fouët C 97/14 Charles Frederick Weideman C 97/15 Francis De Valangin C 97/15 Jacob Kruger C 97/15 John Dornbush C 97/15 Lewis Ferdinand Vigne C 97/15 Abraham Manchet C 97/15 Hardwick Constantien C 97/15 Andrew Linde C 97/16 Claus Sturcke, formerly Brunshousen, Hanover C 97/16 Pierre Barthelemy Guinibert Debac, formerly of Paris, France C 97/16 Henry Frederick Ebert, formerly of Doermantz, Wurtemburg C 97/16 Marten Mehrtens, formerly of Albstedt, Hanover C 97/16 Peter Burch, formerly of Mosbach, Baden C 97/16 Peter Paul Salmoni, formerly of Lugano, Switzerland C 97/16 Joseph Fasana, formerly of Rouenna, Lombardy |
The following Naturalization records can be searched on National Archives UK :
Naturalisation certificates and indexes 1949-1981
Naturalisation certificates 1981-1986 for people born over 100 years ago
Naturalisation case papers to 1996
Registrations of British Nationality 1949-1981 for people born over 100 years ago
Records of the renunciation of British citizenship 1949-1982
Naturalisation certificates 1870-1916
Naturalisation certificates from 1913-1948
Naturalisation case papers 1872-1934
Choose from: Denizations & Naturalizations in England 1509-1603 ~ Letters & Patent of Denization 1752-1830