| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 0 |
| Cambridgeshire | 2 |
| Channel Islands | 3 |
| Cheshire | 40 |
| Cornwall | 1 |
| Cumberland | 6 |
| Derbyshire | 14 |
| Devon | 2 |
| Dorset | 0 |
| Durham | 57 |
| Essex | 5 |
| Gloucestershire | 3 |
| Hampshire | 11 |
| Herefordshire | 0 |
| Hertfordshire | 1 |
| Huntingdonshire | 0 |
| Isle of Man | 0 |
| Kent | 15 |
| Lancashire | 460 |
| Leicestershire | 3 |
| Lincolnshire | 2 |
| London | 262 |
| Middlesex | 9 |
| Northumberland | 8 |
| Norfolk | 1 |
| Northamptonshire | 1 |
| Nottinghamshire | 10 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 2 |
| Surrey | 19 |
| Sussex | 11 |
| Staffordshire | 5 |
| Warwickshire | 16 |
| Westmorland | 18 |
| Wiltshire | 0 |
| Worcestershire | 6 |
| Yorkshire | 123 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 3 |
| Glamorgan | 16 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 2 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 137 |
| Labourer | 47 |
| Hawker | 14 |
| Domestic Servant | 13 |
| Dock Labourer | 12 |
| Servant | 11 |
| Cotton Weaver | 11 |
| Private | 10 |
| House Keeper | 8 |
| Dress Maker | 7 |
| General Servant | 7 |
| Charwoman | 7 |
| Bricklayer Labourer | 6 |
| Shoe Maker | 6 |
| Factory Hand | 6 |
| None | 6 |
| Machinist | 5 |
| Son | 5 |
| Wife | 5 |
| Cotton Spinner | 5 |
| Farm Labourer | 5 |
| Plasterer | 5 |
| Tailor | 5 |
| Laundress | 5 |
| Factory Worker Worsted | 5 |
| 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