| Bedfordshire | 0 |
| Buckinghamshire | 0 |
| Berkshire | 0 |
| Cambridgeshire | 0 |
| Channel Islands | 0 |
| Cheshire | 0 |
| Cornwall | 0 |
| Cumberland | 0 |
| Derbyshire | 0 |
| Devon | 0 |
| Dorset | 0 |
| Durham | 0 |
| Essex | 0 |
| Gloucestershire | 0 |
| Hampshire | 0 |
| Herefordshire | 0 |
| Hertfordshire | 0 |
| Huntingdonshire | 0 |
| Isle of Man | 26 |
| Kent | 0 |
| Lancashire | 0 |
| Leicestershire | 0 |
| Lincolnshire | 0 |
| London | 0 |
| 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 | 0 |
| Warwickshire | 0 |
| Westmorland | 0 |
| Wiltshire | 0 |
| Worcestershire | 0 |
| Yorkshire | 0 |
| Anglesey | 0 |
| Brecknockshire | 0 |
| Cardiganshire | 0 |
| Carnarvonshire | 0 |
| Carmarthenshire | 0 |
| Denbighshire | 0 |
| Flintshire | 0 |
| Glamorgan | 0 |
| Merionethshire | 0 |
| Montgomeryshire | 0 |
| Monmouthshire | 0 |
| Pembrokeshire | 0 |
| Radnorshire | 0 |
| Profession | Census Frequency |
|---|---|
| Fisherman | 3 |
| Agricultural Labourer | 1 |
| Female Servant | 1 |
| Labourer | 1 |
| Male Servant | 1 |
| Mason | 1 |
| Name | Census Frequency |
|---|---|
| Thomas Castain | 11 |
| John Castain | 10 |
| James Castain | 7 |
| Margaret Castain | 7 |
| William Castain | 7 |
| Ann Castain | 5 |
| Elizabeth Castain | 5 |
| Ellinor Castain | 5 |
| Catherine Castain | 4 |
| Jane Castain | 4 |
| Richard Castain | 4 |
| Robert Castain | 3 |
| Agnes Castain | 2 |
| Charles Castain | 2 |
| Charlotte Castain | 2 |
| Henry Castain | 2 |
| Sarah.j Castain | 2 |
| Jessie Castain | 1 |
| Julia Castain | 1 |
| Lillian Castain | 1 |
| Marion Castain | 1 |
| Matilda Castain | 1 |
| Miriam Castain | 1 |
| Rebecca Castain | 1 |
| Sarah Castain | 1 |
| Rank | Surname | Match | Census Frequency |
|---|---|---|---|
| 1 | Costin | 71% | 3,164 |
| 2 | Caston | 71% | 2,878 |
| 3 | Causton | 57% | 2,350 |
| 4 | Coston | 57% | 2,150 |
| 5 | Costain | 86% | 1,869 |
| 6 | Costen | 57% | 800 |
| 7 | Caustin | 71% | 378 |
| 8 | Castin | 86% | 171 |
| 9 | Custon | 57% | 131 |
| 10 | Custin | 71% | 122 |
| 11 | Castain | 100% | 101 |
The surname Castain is the 11th most popular variant of Costin.