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The following alternate names exist for this unit:
| Name | Status | Language | Start | End | Authority |
|---|---|---|---|---|---|
| LLANFAIR TRELYGEN | Preferred | English | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 118. | ||
| LLANFAIR TREF HELYGEN | Alternate | English | 1851 Census of Great Britain, Table [1], 'Population Abstract'. | ||
| LLAN FAIR TREF HELYGON | Alternate | English | 1831 Census of Great Britain, Table [1], 'Population Abstract'. | ||
| LLANFAIR TREFLYGEN | Alternate | English | 1901 Census of England and Wales, Table 12, 'Registration County, Districts, and Sub-Districts, with their Constituent Civil Parishes - Area; Houses and Population 1891 and 1901, and Separate Occupiers 1901'. | ||
| LLANFAIRTREFLYGEN | Alternate | English | 1871 Census of England and Wales, Table 4, 'Area; Houses and Inhabitants, 1861 and 1871, in the Parishes and Places comprised in each Superintendent Registrar's District'. | ||
| TREFHELYGEN | Alternate | English | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 118. |
The unit has had the following statuses:
| Status | Abbreviation | Start | End | Authority |
|---|---|---|---|---|
| Chapelry | Ch | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969) Permission granted to project. | ||
| Ancient Parish | AP | 1831 Census of Great Britain, Abstract of answers, Table [1] , 'Population Abstract' | ||
| Civil Parish | CP | 1901 Census of England and Wales, County Report, Table 12 , 'Registration County, Districts, and Sub-Districts, with their Constituent Civil Parishes - Area; Houses and Population 1891 and 1901, and Separate Occupiers 1901' |
This unit contained the following units:
| Name | Type | Start | End | Authority |
|---|---|---|---|---|
| TREFHELYGEN Tn | Parish-level Unit | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 118. |
This unit was part of the following units:
This unit was affected by the following changes:
| Date | Type of change | Other unit involved | Area transferred | Authority |
|---|---|---|---|---|
| 01 Apr 1934 | was abolished to enlarge | LLANDYFRIOG CP/AP | Area: 650 acres. Population in 1931: 50. | 1931 Census of England and Wales, Table B, 'Areas altered between 26th April, 1931 and 30th June, 1934, showing constitution as at the latter date, in terms of constitution as at the former date, together with particulars of acreage and population'.; M. of H. Order No. 77523. The Cardiganshire Review Order, 1934 |
If the boundaries of the Parish-level Unit changed over time, this map will show all the different boundaries.
How to reference this page:
GB Historical GIS / University of Portsmouth, Llanfair Trelygen Parish (Ch/AP/CP) through time, A Vision of Britain through Time.
URL: https://www.visionofbritain.org.uk/unit/10421275
Date accessed: 08th April 2026