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The unit has had the following statuses:
| Status | Abbreviation | Start | End | Authority |
|---|---|---|---|---|
| Township | Tn | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969) Permission granted to project. | ||
| Civil Parish | CP | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969) Permission granted to project. | ||
| Ancient Parish | AP | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969) Permission granted to project. | ||
| Chapelry | Ch | 1851 Census of Great Britain, Population tables 1, Table 3 , 'England and Wales. Houses and Population enumerated in 1851 in Registration Counties' |
This unit contained the following units:
| Name | Type | Start | End | Authority |
|---|---|---|---|---|
| BODWINA Hmlt | Parish-level Unit | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 17. | ||
| CEMAIS COED Tn | Parish-level Unit | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 40. | ||
| GWALCHMAI Tn | Parish-level Unit | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 81. | ||
| HAFOD Y LLWYN Tn | Parish-level Unit | M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 87. |
This unit was part of the following units:
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, Trewalchmai Parish (Tn/CP/AP/Ch) through time, A Vision of Britain through Time.
URL: https://www.visionofbritain.org.uk/unit/10313922
Date accessed: 08th April 2026