| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 0 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 1 |
| Cornwall | 1 |
| Cumberland | 0 |
| Derbyshire | 3 |
| Devon | 0 |
| Dorset | 0 |
| Durham | 8 |
| Essex | 1 |
| Gloucestershire | 3 |
| Hampshire | 0 |
| Herefordshire | 0 |
| Hertfordshire | 0 |
| Huntingdonshire | 0 |
| Isle of Man | 0 |
| Kent | 0 |
| Lancashire | 36 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 7 |
| Middlesex | 2 |
| Northumberland | 1 |
| Norfolk | 0 |
| Northamptonshire | 2 |
| Nottinghamshire | 0 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 0 |
| Surrey | 4 |
| Sussex | 0 |
| Staffordshire | 9 |
| Warwickshire | 5 |
| Westmorland | 1 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 7 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 8 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 1 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 6 |
| General Labourer | 4 |
| Domestic Servant | 2 |
| Cotton Mill Operator | 2 |
| Farm Servant | 2 |
| General Servant | 2 |
| Hosepipe Maker | 2 |
| House Maid Domestic Servant | 2 |
| Living On Own Means | 2 |
| Labourer On Iron Works | 2 |
| Book Keeper | 1 |
| Clerk | 1 |
| Clothes Dealer | 1 |
| Cotton Spinner | 1 |
| Cotton Winder | 1 |
| Fish Dealer | 1 |
| Grey Cloth Merchant | 1 |
| Grocer's Assistant | 1 |
| Laborer | 1 |
| Machinist | 1 |
| Office Cleaner | 1 |
| Public House Manager | 1 |
| Boots | 1 |
| Iron Worker | 1 |
| Potter's Scourer | 1 |
| Name | Census Frequency |
|---|---|
| Mary Brennen | 118 |
| John Brennen | 113 |
| Thomas Brennen | 77 |
| James Brennen | 76 |
| William Brennen | 53 |
| Margaret Brennen | 37 |
| Elizabeth Brennen | 34 |
| Patrick Brennen | 34 |
| Catherine Brennen | 33 |
| Ellen Brennen | 33 |
| Edward Brennen | 30 |
| George Brennen | 29 |
| Annie Brennen | 26 |
| Bridget Brennen | 25 |
| Sarah Brennen | 25 |
| Ann Brennen | 24 |
| Michael Brennen | 23 |
| Joseph Brennen | 19 |
| Eliza Brennen | 16 |
| Peter Brennen | 15 |
| Alice Brennen | 14 |
| Jane Brennen | 14 |
| Henry Brennen | 11 |
| Emma Brennen | 10 |
| Rose Brennen | 10 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Brennan | 86% | 13,289 |
| 2 | Brannan | 71% | 7,262 |
| 3 | Brannon | 71% | 4,297 |
| 4 | Brannen | 86% | 1,584 |
| 5 | Brennen | 100% | 1,284 |
| 6 | Brennon | 86% | 947 |
| 7 | Brenen | 86% | 344 |
| 8 | Brinnen | 86% | 134 |
| 9 | Brinnan | 71% | 132 |
| 10 | Brunnen | 86% | 109 |
The surname Brennen is the 5th most popular variant of Brennan.