Guild of One-Name Studies
One-name studies, Genealogy
Category: 1 - A study where research using core genealogical datasets and transcriptions is in its early stages.
DNA website: www.familytreedna.com/groups/cosby/about
Contact: Ms Wendy Cosby
This study endeavours to share documentation, provide clarification and flesh out the bare bones of earlier research on various ancestors. It hopes to minimize duplication of effort and expand the scope of research from one particular family to a larger family of origin where all descendants can find their place.
The name was registered with the Guild of One-Name Studies in 2018.
Cozby and Crosby are name variants particular to a line in Charles Cosby’s Virginia family.
Cosby is an English locative name from Cosby (Leics).
 Hanks, Patrick. (2003) Dictionary of American Family Names. Cosby. DOI: 10.1093/acref/9780195081374.001.0001 : accessed 07 March 2020.
 MacLysaght, Edward. (1985) The Surnames of Ireland. 6th ed. Dublin: Irish Academic Press Limited. p. 60.
Notable family members include:
Francis Cosby (1510-80): Born in Great Leake, Nottinghamshire, England. He settled at Stradbally, Queens County, Ireland during the Tudor conquest of Leinster.
One of his grandsons, Charles, went to Virginia in 1628 and established an extensive Virginia line.
Another of his grandsons, Richard, produced a wave of emigrants in the early 1700’s. They included sailors, soldiers, government officials and merchant adventurers. Brothers and cousins, they travelled and served together in different countries. They were very mobile and left descendants in many countries including Canada, Australia, India and the Caribbean.
William Cosby (1685-1736): Governor of New York and New Jersey (1732-36). Bound as an apprentice by his older brother, this William Cosby had his heart set on joining the army at an early age and prevailed against the wishes of his parents. He distinguished himself at a siege of Tournai and was made a lieutenant for his bravery and courage. He caught the attention of a mentor who sent him to Utrecht for an education. As a Colonel with the 18th Irish Regiment, he served in Minorca, Gibraltar, the Leeward Islands, and was Governor of New York and New Jersey from 1732 until his death at Fort George, New York in 1736;
Sir Henry Augustus Montague Cosby (1743-1822): Henry was born in Minorca where his father was stationed. He first saw service as a volunteer in the army at the age of 13. At about the age of 17, he distinguished himself by saving the life of the major commanding H.M.'s 79th regiment, who offered him an ensigncy in his regiment, which he refused. He was knighted for his services at the age of 40. He left a number of children, some of whom never left India. He also has descendants in Australia.
Current frequences: Great Britian 445, Ireland 731
1 Hanks, Patrick, Coates, Richard and McClure, Peter. (2016) Cosby. In: The Oxford Dictionary of Family Names in Britain and Ireland. Oxford: Oxford University Press.
1 Fenwick, C. C., ed. (1998–2005). The Poll Taxes of 1377, 1379 and 1381 (3 volumes). Records of Social and Economic History New Series 27, 29, 37. Oxford: British Academy.
2 Baptisms (PR) England. Spalding, Lincoln. 31 August 1562. COZBY, Thoms. Source film no. 504,762, 504,763, 504,764. [Transcription] Collection: England Births and Christenings, 1538-1975. https://www.familysearch.org/ark:/61903/1:1:NGVL-4F9 : accessed 03 Februray 2020.
3 Marriages (PR) England. Lowdham, Nottingham. 07 February 1586. COSBYE, Robert and GRYMBOLDE, Margarett. Source film no: 95038. [Transcription] Collection: England Marriages, 1538-1973. https://www.familysearch.org/ark:/61903/1:1:N2YJ-SY6 : accessed 03 February 2020.
4 Marriages (PR) England. All Saints, Derby. 21 Dec 1589. COSBIE, Nicolaus and BONSALL, Margaria. Source film no. 422201 [Transcription] Collection: England Marriages, 1538-1973. https://www.familysearch.org/ark:/61903/1:1:NVM9-6ZW : accessed 03 February 2020.
5 Marriages (PR) England. Cadeby, Leicester. 25 Nov 1606. COSBIE, Richard and BALL, Margaret. Source film no. 590860 . [Transcription] Collection: England Marriages, 1538-1973. https://www.familysearch.org/ark:/61903/1:1:NLQ3-JMQ : accessed 03 February 2020.
Distribution of the surname COSBY (and variants COSBEY, COSBIE) in the 1901 and 1911 Ireland census records:
At some point, every document trail grows cold. DNA results can jump over hurdles until supporting documentation is found. In a one-name study where the focus is on the paternal line, the focus is on Y-DNA.
If you are a male member of this family, please join our Y-DNA project at this link "Cosby" Group DNA Project in the FamilyTreeDNA Group Projects. Y-DNA kits are available from FamilyTreeDNA.com and are often on sale during holidays. Please contact the project administrator if you have any questions.
Images: Engraving. Admiral Philips Cosby (1726-1808). circa 1800. Robinson (artist). William Ridley, Engraver. Joyce Gold, Publisher. http://www.nmm.ac.uk/collections/prints/viewRepro.cfm?reproID=PU3086 : accessed 07 March 2020.
You may find our other Guild websites of interest: