Sources
Everything on this site rests on the sources below. Primary records are listed apart from later interpretation.
Primary records are listed apart from later scholarship. Where a claim on this site rests on interpretation, it is graded as such.
Documented / Scholarly interpretation / Tradition / Uncertain or disputed. † Based on a secondary source that has not yet been checked against the original.
Original records
- 1.Logainm.ie, ‘Croich Uí Bhaoill / Crohyboyle’ (townland, Templecrone, Co. Donegal), with historical forms and explanation. logainm.ie
- 2.Annála Ríoghachta Éireann (Annals of the Four Masters), ed. and trans. John O’Donovan (1848–51), vol. 3, years 1171–1378; text at CELT (T100005C, Irish G100005C). celt.ucc.ie
- 3.Annála Ríoghachta Éireann (Annals of the Four Masters), ed. and trans. John O’Donovan, years 1500–1588; text at CELT (T100005E). celt.ucc.ie
- 4.Annála Ríoghachta Éireann (Annals of the Four Masters), ed. and trans. John O’Donovan, years 1589–1616; text at CELT (T100005F, Irish G100005F). celt.ucc.ie
- 5.Donagh Mooney, A History of the Franciscan Order in Ireland (early 17th century), trans.; text at CELT (T300002-002). celt.ucc.ie
- 6.Royal Irish Academy, Doegen Records Web Project: Domhnall Ó Baoighill (Daniel Boyle), An Chlasaidh, Dúchoraidh, record LA 1256, ‘Feardhomhain’ (recorded 1928–31). doegen.ie
- 7.Royal Irish Academy, Doegen Records Web Project: Pádraig Ó Baoighill (Patrick Boyle), Leitir Catha, records LA 1247–1248 (recorded 1928–31). doegen.ie
- 8.Annála Uladh (Annals of Ulster), Irish text and translation at CELT (G100001A–B, T100001A–B); entries for 1099, 1106, 1160 and 1203. celt.ucc.ie
- 9.Logainm.ie, ‘Mullán Tí Uí Bhaoill / Mullantiboyle’ (Co. Donegal), with historical forms and O’Donovan’s explanation. logainm.ie
- 10.Annála Ríoghachta Éireann (Annals of the Four Masters), ed. and trans. John O’Donovan, years 1379–1500; text at CELT (T100005D). celt.ucc.ie
- 11.1641 Depositions, Trinity College Dublin MS 839: depositions of John Ravenscroft (fols 133r–v), Ann Dutton (fols 129r–130v) and James Kenedy (fols 131r–v). 1641.tcd.ie
- 12.The Statutes at Large, passed in the Parliaments held in Ireland, vol. 15 (Dublin, 1792): ‘An Act for the Division of certain Baronies of great Extent in the Counties of Donegal and Meath’ (1791). archive.org
- 13.Logainm.ie, ‘Baile Uí Bhaoighill / Ballyboyle’ (Killymard, Co. Donegal), with historical forms 1440–1835. logainm.ie
- 14.Logainm.ie, ‘Oileán Uí Bhaoill / Boyle’s Island’ (Tullaghobegly, Co. Donegal). logainm.ie
- 15.Logainm.ie, ‘Ailt Uí Bhaoill / Altanyweel’ (Tullaghobegly, Co. Donegal). logainm.ie
- 16.Logainm.ie, ‘Mín Uí Bhaoill’ (sub-townland, Crolly, Co. Donegal). logainm.ie
- 17.John Speed, ‘The Province Ulster described’ (London: John Sudbury and George Humble, 1610); Bibliothèque nationale de France copy (Gallica btv1b530569973). commons.wikimedia.org
Scholarship and reference works
- 18.Patrick Woulfe, Sloinnte Gaedheal is Gall: Irish Names and Surnames (Dublin, 1923), s.v. Ó Baoighill. libraryireland.com
- 19.Woulfe (1923), entry on Cinel Conaill. libraryireland.com
- 20.Woulfe (1923), s.v. Ó Domhnaill. libraryireland.com
- 21.P. W. Joyce, The Origin and History of Irish Names of Places (1883). archive.org
- 22.Logainm.ie, Placenames Database of Ireland (Fiontar & Scoil na Gaeilge, DCU / Dept. of Housing, Local Government and Heritage). logainm.ie
- 23.Edward MacLysaght, The Surnames of Ireland (Irish Academic Press, 6th ed. 1985), s.v. Boyle / O'Boyle.
- 24.Dictionary of Irish Biography (Royal Irish Academy), entries for Aodh Rua Ó Domhnaill and the Flight of the Earls. dib.ie
- 25.National Monuments Service (Ireland), Inishkeel monastic site, National Monument DG064-003. archaeology.ie
- 26.Catholic-Hierarchy.org, ‘Bishop Nial O’Boyle’ (Raphoe, appointed 9 August 1591, died 6 February 1611), citing Hierarchia Catholica, vol. 3, p. 282. catholic-hierarchy.org
- 27.Diarmuid Breathnach & Máire Ní Mhurchú, ‘Ó BAOIGHILL, Aindrias (1888–1972)’, ainm.ie. ainm.ie
- 28.Ciarán Ó Duibhín, ‘Aindrias Ó Baoighill’, notes with census, civil and newspaper references. teanga.info
- 29.Diarmuid Breathnach & Máire Ní Mhurchú, ‘Ó BAOILL, Micí Sheáin Néill (1901–1981)’, ainm.ie. ainm.ie
- 30.Diarmuid Breathnach & Máire Ní Mhurchú, ‘NÍ BHAOILL, Bríd (c.1928–1991)’, ainm.ie. ainm.ie
- 31.Diarmuid Breathnach & Máire Ní Mhurchú, ‘Ó RABHARTAIGH, Tadhg (1909–1982)’, ainm.ie. ainm.ie
- 32.Ciarán Ó Duibhín, notes on Domhnall Ó Baoighill (Doegen speaker), with census and civil records. teanga.info
- 33.Ciarán Ó Duibhín, notes on Pádraig ‘Paidí Duncaí’ Ó Baoighill (Doegen speaker). teanga.info
- 34.Dictionary of Irish Biography, ‘O’Donnell (Ó Domhnaill), Conchobhar’ (d. 1342). dib.ie
- 35.Dictionary of Irish Biography, ‘O’Donnell (Ó Domnaill), Domnall Mór’. dib.ie
- 36.Dictionary of Irish Biography, ‘MacMahon, Heber (Ever, Emer)’ (mentions Turlough O’Boyle, 1649). dib.ie
- 37.National Archives of Ireland, ‘Finding people in the Census 1926’ (on Irish-language forms and how they were transcribed). nationalarchives.ie
- 38.Dan Buckley, ‘History counts’, Irish Examiner, 4 April 2011 (no Irish-language census form in 1911). irishexaminer.com
- 39.Ronan McGreevy, ‘The surprise findings from Census 1926: only 1% returns in Irish …’, Irish Times, 18 April 2026. irishtimes.com
- 40.Litriú na Gaeilge: Lámhleabhar an Chaighdeáin Oifigiúil (Oifig an tSoláthair, c.1945–47), rule 14 (medial gh dropped). archive.org
- 41.Logainm.ie, ‘Baollaigh / Boylagh’ (barony, Co. Donegal). logainm.ie
- 42.Woulfe (1923), s.v. Ó Baoighealláin (Boylan). libraryireland.com
- 43.Logainm.ie, ‘Sound recordings’ (recorded mainly 2008–2014 by Fiontar DCU with the Placenames Branch; native speakers for Gaeltacht counties). logainm.ie
- 44.John O’Donovan (ed.), Annals of the Kingdom of Ireland by the Four Masters, 2nd ed. (Dublin, 1856), editor’s footnotes; scans at the Internet Archive (vols 3–6). archive.org
- 45.National Monuments Service, Sites and Monuments Record DG099-008001-, ‘Ballyboyle Castle (site of)’, Summerhill townland, Co. Donegal (text from Lacey et al. 1983). heritagedata.maps.arcgis.com
- 46.National Monuments Service, Sites and Monuments Record DG073-001001-, castle, Kiltooris townland, Co. Donegal. heritagedata.maps.arcgis.com
- 47.National Monuments Service, Sites and Monuments Record DG016-024001-, Faugher (An Fhothair), Co. Donegal. heritagedata.maps.arcgis.com
- 48.National Monuments Service, Sites and Monuments Record DG064-011----, ringfort-cashel, Drumboghill townland (‘The Bawan’, ‘Doon Fort’ or ‘O Boyle’s Fort’). heritagedata.maps.arcgis.com
- 49.George Hill, An Historical Account of the Plantation in Ulster (Belfast, 1877), with abstracts of patents and state papers. archive.org
- 50.‘The lost Northern Ireland census of 1926’, QPOL (Queen’s University Belfast); PRONI and NISRA confirmed the loss of the returns in 2013. blogs.qub.ac.uk
- 51.Office for National Statistics, Freedom of Information response ‘Complete list of all forenames and surnames in the UK’ (25 June 2020). ons.gov.uk
Datasets
- 52.National Records of Scotland, Most Common Surnames 2025, data tables (surnames in the birth, marriage and death registers, 1975–2025; surnames with at least 10 entries a year). nrscotland.gov.uk
- 53.Museums of History NSW – State Archives Collection, Assisted Immigrants Index 1839–1896 and Unassisted Immigrants Index 1842–1855 (searched October 2026). mhnsw.au
- 54.Public Record Office Victoria, VPRS 14 Register of Assisted Immigrants from the United Kingdom, 1839–1871 (index, searched via the PROV API, October 2026). prov.vic.gov.au
- 55.Public Record Office Victoria, VPRS 947 Inward Overseas Passenger Lists, 1852–1923 (index, searched via the PROV API, October 2026). prov.vic.gov.au
- 56.Steven Ruggles, Sarah Flood, Matthew Sobek, Daniel Backman, Grace Cooper, Julia A. Rivera Drew, Stephanie Richards, Renae Rodgers, Jonathan Schroeder, and Kari C.W. Williams. IPUMS USA: Version 16.0 [dataset]. Minneapolis, MN: IPUMS, 2025. Samples 1850–1930 that include surnames; weighted estimates by this site. Only aggregate figures are published. doi.org
- 57.National Archives of Ireland, Census of Ireland 1901 and 1911, and Census of Ireland 1926 (1926 data licensed CC BY 4.0). Counts by county from the census search, October 2026; method in this site’s source (scripts/census-ie.mjs). nationalarchives.ie
- 58.Robert E. Matheson, Special Report on Surnames in Ireland (Dublin, 1894), based on the birth indexes for 1890; entry for Boyle. libraryireland.com
- 59.US Census Bureau, Frequently Occurring Surnames from the 1990, 2000 and 2010 Censuses, and Frequently Occurring Last Names in the 2020 Census (April 2026). census.gov
Images and map data
- 60.Tailte Éireann, Electoral Divisions – National Statutory Boundaries – 2019 – Generalised 20m (CC BY 4.0), Tailte Éireann open data portal. data-osi.opendata.arcgis.com
- 61.townlands.ie, county boundaries derived from OpenStreetMap (© OpenStreetMap contributors, ODbL). townlands.ie
- 62.Map data © OpenStreetMap contributors (ODbL). openstreetmap.org
Image credits
- Maghery and Crohy Tower from the lough. Mhdelaney, 2021. Licence: CC BY-SA 4.0. commons.wikimedia.org (resized and converted)
- Gweebarra Bay and Crohy Head from Narin. Mhdelaney, 2021. Licence: CC BY-SA 4.0. commons.wikimedia.org (resized and converted)
- Crohyboyle townland. Mac McCarron, 2012. Licence: CC BY-SA 2.0. geograph.ie (converted)
- John Speed, The Province Ulster, 1610: west Donegal. John Speed; Bibliothèque nationale de France / gallica.bnf.fr, 1610. Licence: Public domain. commons.wikimedia.org (cropped, resized and converted)
- John Speed, The Province Ulster described, 1610. John Speed; Bibliothèque nationale de France / gallica.bnf.fr, 1610. Licence: Public domain. commons.wikimedia.org (resized and converted)
- P. W. Joyce, baronies of County Donegal, 1900. P. W. Joyce, Atlas and Cyclopedia of Ireland, 1900. Licence: Public domain. commons.wikimedia.org (resized and converted)
- 1926 census: Form A, Meenmore, Dungloe. National Archives of Ireland, 1926. Licence: CC BY 4.0. nationalarchives.ie (resized and converted from PDF)
- Woulfe, Irish Names and Surnames, p. 86. Patrick Woulfe (Dublin: M. H. Gill); Internet Archive, 1922. Licence: Public domain. archive.org (resized and converted)
- Annals of the Four Masters, ed. O’Donovan, 1588 (p. 1866). John O’Donovan (ed.), 1856; Internet Archive (University of Toronto), 1856. Licence: Public domain. archive.org (resized and converted)
- Matheson, Special Report on Surnames, p. 33. Robert E. Matheson, 1894; Internet Archive (Cornell University Library), 1894. Licence: Public domain. archive.org (resized and converted)
- Joyce, Irish Names of Places, vol. 1, p. 141. P. W. Joyce; Internet Archive (University of Toronto). Licence: Public domain. archive.org (resized and converted)
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