| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 8 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 39 |
| Cornwall | 9 |
| Cumberland | 1 |
| Derbyshire | 2 |
| Devon | 4 |
| Dorset | 2 |
| Durham | 42 |
| Essex | 26 |
| Gloucestershire | 0 |
| Hampshire | 3 |
| Herefordshire | 4 |
| Hertfordshire | 2 |
| Huntingdonshire | 0 |
| Isle of Man | 0 |
| Kent | 23 |
| Lancashire | 389 |
| Leicestershire | 2 |
| Lincolnshire | 0 |
| London | 176 |
| Middlesex | 8 |
| Northumberland | 11 |
| Norfolk | 2 |
| Northamptonshire | 0 |
| Nottinghamshire | 9 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 11 |
| Surrey | 7 |
| Sussex | 1 |
| Staffordshire | 27 |
| Warwickshire | 14 |
| Westmorland | 1 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 155 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 1 |
| Flintshire | 2 |
| Glamorgan | 32 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 1 |
| Pembrokeshire | 1 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 162 |
| General Labourer | 33 |
| Labourer | 22 |
| Cotton Weaver | 12 |
| Coal Miner | 9 |
| Char Woman | 7 |
| General Servant Domestic | 7 |
| Dress Maker | 7 |
| Tailor | 7 |
| Dock Labourer | 6 |
| House Keeper | 6 |
| Domestic Servant | 6 |
| Tailoress | 6 |
| Cotton Spinner | 5 |
| Hawker | 5 |
| Laundress | 5 |
| Brick Layer | 4 |
| Bricklayer's Labourer | 4 |
| Cotton Frame Tenter | 4 |
| General Servant | 3 |
| Carter | 3 |
| Charwoman | 3 |
| Chemical Labourer | 3 |
| School | 3 |
| Farm Labourer | 3 |
| Name | Census Frequency |
|---|---|
| Mary Brennan | 1,375 |
| John Brennan | 1,193 |
| James Brennan | 878 |
| Thomas Brennan | 746 |
| William Brennan | 462 |
| Margaret Brennan | 419 |
| Michael Brennan | 418 |
| Elizabeth Brennan | 406 |
| Patrick Brennan | 404 |
| Catherine Brennan | 350 |
| Ellen Brennan | 322 |
| Annie Brennan | 231 |
| Ann Brennan | 229 |
| Edward Brennan | 217 |
| Bridget Brennan | 214 |
| Sarah Brennan | 210 |
| Jane Brennan | 182 |
| Joseph Brennan | 182 |
| Peter Brennan | 146 |
| Martin Brennan | 135 |
| George Brennan | 125 |
| Alice Brennan | 122 |
| Robert Brennan | 105 |
| Henry Brennan | 96 |
| Eliza Brennan | 93 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Brennan | 100% | 13,289 |
| 2 | Brannan | 86% | 7,262 |
| 3 | Brannon | 71% | 4,297 |
| 4 | Brannen | 71% | 1,584 |
| 5 | Brenan | 86% | 1,296 |
| 6 | Brennen | 86% | 1,284 |
| 7 | Brennon | 86% | 947 |
| 8 | Brinnen | 71% | 134 |
| 9 | Brinnan | 86% | 132 |
| 10 | Brunnen | 71% | 109 |
The surname Brennan is the most popular version of all its varients