| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 6 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 0 |
| Cornwall | 38 |
| Cumberland | 0 |
| Derbyshire | 0 |
| Devon | 0 |
| Dorset | 0 |
| Durham | 0 |
| Essex | 3 |
| Gloucestershire | 0 |
| Hampshire | 0 |
| Herefordshire | 0 |
| Hertfordshire | 0 |
| Huntingdonshire | 0 |
| Isle of Man | 1 |
| Kent | 1 |
| Lancashire | 0 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 16 |
| Middlesex | 3 |
| Northumberland | 0 |
| Norfolk | 0 |
| Northamptonshire | 5 |
| Nottinghamshire | 1 |
| Oxfordshire | 0 |
| Rutland | 0 |
| Shropshire | 0 |
| Suffolk | 0 |
| Somerset | 8 |
| Surrey | 0 |
| Sussex | 0 |
| Staffordshire | 0 |
| Warwickshire | 0 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 0 |
| Anglesey | 0 |
| Brecknockshire | 12 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 0 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 4 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Scholar | 20 |
| Carpenter | 3 |
| General Labourer | 2 |
| Coal Miner | 2 |
| Farmer | 2 |
| Farmers Daughter | 2 |
| Farmers Son | 2 |
| Lace Factory | 2 |
| Tin Miner | 2 |
| Domestic Parlour Maid Servant | 1 |
| Assistant At Home | 1 |
| Copper Miner | 1 |
| Dress Maker's Apprentice | 1 |
| General Servant Domestic | 1 |
| Living On Own Means | 1 |
| Dock Labourer | 1 |
| Fisherman | 1 |
| Clerk | 1 |
| Coach Porter | 1 |
| Fancy Box Maker | 1 |
| Labourer In Royal Arsenal | 1 |
| Operatic Artist Music Singer | 1 |
| Bricklayer Labourer | 1 |
| Carpenter & Wheelwright | 1 |
| Farm Servant | 1 |
| Name | Census Frequency |
|---|---|
| John Trevillian | 45 |
| James Trevillian | 35 |
| Mary Trevillian | 35 |
| William Trevillian | 35 |
| Elizabeth Trevillian | 30 |
| Ann Trevillian | 22 |
| Sarah Trevillian | 20 |
| Jane Trevillian | 19 |
| Henry Trevillian | 17 |
| Thomas Trevillian | 17 |
| Charles Trevillian | 16 |
| Eliza Trevillian | 15 |
| George Trevillian | 15 |
| Joseph Trevillian | 14 |
| Caroline Trevillian | 11 |
| Frederick Trevillian | 8 |
| Samuel Trevillian | 8 |
| Charlotte Trevillian | 7 |
| Emma Trevillian | 7 |
| Walter Trevillian | 7 |
| Ellen Trevillian | 6 |
| Francis Trevillian | 6 |
| Grace Trevillian | 6 |
| Margaret Trevillian | 6 |
| Martha Trevillian | 6 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Trevallion | 80% | 676 |
| 2 | Trevillian | 100% | 580 |
| 3 | Trevillion | 90% | 421 |
The surname Trevillian is the 2nd most popular variant of Trevallion.