| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 0 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 6 |
| Cornwall | 0 |
| Cumberland | 0 |
| Derbyshire | 0 |
| Devon | 3 |
| Dorset | 0 |
| Durham | 26 |
| Essex | 0 |
| Gloucestershire | 4 |
| Hampshire | 1 |
| Herefordshire | 3 |
| Hertfordshire | 0 |
| Huntingdonshire | 0 |
| Isle of Man | 0 |
| Kent | 0 |
| Lancashire | 12 |
| Leicestershire | 1 |
| Lincolnshire | 0 |
| London | 4 |
| Middlesex | 0 |
| Northumberland | 0 |
| Norfolk | 0 |
| Northamptonshire | 0 |
| Nottinghamshire | 0 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 0 |
| Surrey | 0 |
| Sussex | 0 |
| Staffordshire | 4 |
| Warwickshire | 4 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 1 |
| Yorkshire | 0 |
| Anglesey | 0 |
| Brecknockshire | 4 |
| Cardiganshire | 19 |
| Carnarvonshire | 3 |
| Carmarthenshire | 23 |
| Denbighshire | 1 |
| Flintshire | 0 |
| Glamorgan | 584 |
| Merionethshire | 0 |
| Montgomeryshire | 1 |
| Monmouthshire | 38 |
| Pembrokeshire | 31 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 110 |
| Coal Miner | 49 |
| Collier | 25 |
| Labourer | 15 |
| General Servant | 10 |
| Farmers Son | 8 |
| Haulier | 8 |
| Farmer | 7 |
| Domestic Servant | 7 |
| Dress Maker | 6 |
| Farm Servant | 5 |
| Labourer Daughter | 5 |
| Labourer Son | 5 |
| Iron Ore Miner | 5 |
| Miner | 5 |
| General Servant Domestic | 4 |
| Dressmaker | 4 |
| Butcher | 4 |
| Farmer's Son | 4 |
| Farmers Daughter | 4 |
| Tailor | 4 |
| Colliers Wife | 3 |
| Labourer Wife | 3 |
| Pudler | 3 |
| Wife | 3 |
| Name | Census Frequency |
|---|---|
| Mary Llewelyn | 513 |
| William Llewelyn | 432 |
| John Llewelyn | 390 |
| Thomas Llewelyn | 372 |
| David Llewelyn | 314 |
| Elizabeth Llewelyn | 245 |
| Margaret Llewelyn | 223 |
| Ann Llewelyn | 210 |
| Sarah Llewelyn | 161 |
| Evan Llewelyn | 126 |
| Catherine Llewelyn | 111 |
| Jane Llewelyn | 106 |
| Hannah Llewelyn | 79 |
| Edward Llewelyn | 72 |
| Martha Llewelyn | 63 |
| George Llewelyn | 60 |
| James Llewelyn | 58 |
| Annie Llewelyn | 57 |
| Anne Llewelyn | 55 |
| Llewelyn Llewelyn | 50 |
| Richard Llewelyn | 49 |
| Rachel Llewelyn | 45 |
| Rees Llewelyn | 44 |
| Henry Llewelyn | 43 |
| Joseph Llewelyn | 42 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Llewellyn | 89% | 27,005 |
| 2 | Llewelyn | 100% | 5,751 |
| 3 | Lewellyn | 75% | 1,769 |
| 4 | Llewellen | 78% | 738 |
| 5 | Lewelyn | 88% | 718 |
| 6 | Lewellen | 63% | 432 |
| 7 | Llewlyn | 88% | 163 |
| 8 | Llwelyn | 88% | 100 |
The surname Llewelyn is the 2nd most popular variant of Llewellyn.