| Bedfordshire | 1 |
| Buckinghamshire | 5 |
| Berkshire | 8 |
| Cambridgeshire | 16 |
| Channel Islands | 16 |
| Cheshire | 50 |
| Cornwall | 119 |
| Cumberland | 5 |
| Derbyshire | 1 |
| Devon | 385 |
| Dorset | 4 |
| Durham | 66 |
| Essex | 124 |
| Gloucestershire | 77 |
| Hampshire | 117 |
| Herefordshire | 10 |
| Hertfordshire | 14 |
| Huntingdonshire (and Rutland) | 4 |
| Isle of Man | 2 |
| Kent | 36 |
| Lancashire | 99 |
| Leicestershire | 1 |
| Lincolnshire | 38 |
| London | 496 |
| Middlesex | 48 |
| Northumberland | 16 |
| Norfolk | 222 |
| Northamptonshire | 1 |
| Nottinghamshire | 18 |
| Oxfordshire | 54 |
| Rutland (and Huntingdonshire) | 4 |
| Shropshire | 5 |
| Suffolk | 89 |
| Somerset | 168 |
| Surrey | 64 |
| Sussex | 14 |
| Staffordshire | 75 |
| Warwickshire | 17 |
| Westmorland | 0 |
| Wiltshire | 29 |
| Worcestershire | 24 |
| Yorkshire | 148 |
| Anglesey | 0 |
| Brecknockshire | 5 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 1 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 52 |
| Merionethshire | 0 |
| Montgomeryshire | 7 |
| Monmouthshire | 18 |
| Pembrokeshire | 38 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 539 |
| Agricultural Labourer | 93 |
| Dress Maker | 38 |
| Domestic Servant | 31 |
| General Servant | 25 |
| General Labourer | 24 |
| Labourer | 23 |
| Annuitant | 19 |
| Laundress | 17 |
| Farm Labourer | 17 |
| Carpenter | 15 |
| Farm Servant Indoor | 12 |
| Tailoress | 11 |
| Clerk | 10 |
| No Occupation | 10 |
| Tailor | 10 |
| Coal Miner | 10 |
| House Keeper | 9 |
| Shoe Maker | 9 |
| Servant | 8 |
| Thatcher | 7 |
| Charwoman | 6 |
| Commercial Clerk | 6 |
| Baker | 6 |
| Farm Servant | 6 |
| Name | Census Frequency |
|---|---|
| William Brock | 1,472 |
| Mary Brock | 1,333 |
| John Brock | 1,083 |
| Elizabeth Brock | 918 |
| George Brock | 668 |
| James Brock | 644 |
| Sarah Brock | 573 |
| Thomas Brock | 561 |
| Charles Brock | 433 |
| Ann Brock | 408 |
| Henry Brock | 390 |
| Eliza Brock | 314 |
| Jane Brock | 297 |
| Frederick Brock | 270 |
| Emma Brock | 266 |
| Samuel Brock | 258 |
| Ellen Brock | 246 |
| Robert Brock | 244 |
| Richard Brock | 235 |
| Alice Brock | 221 |
| Emily Brock | 216 |
| Annie Brock | 208 |
| Edward Brock | 205 |
| Arthur Brock | 196 |
| Joseph Brock | 193 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Brook | 80% | 95,789 |
| 2 | Brock | 100% | 20,149 |
| 3 | Brick | 80% | 7,966 |
| 4 | Brack | 80% | 2,357 |
| 5 | Birck | 60% | 2,029 |
| 6 | Broch | 80% | 717 |
| 7 | Bruck | 80% | 266 |
| 8 | Burck | 60% | 227 |
| 9 | Breck | 80% | 215 |
| 10 | Brockie | 71% | 209 |
| 11 | Brocq | 80% | 176 |
| 12 | Berck | 60% | 155 |
| 13 | Broock | 83% | 126 |
The surname Brock is the 2nd most popular variant of Brook.