Alternative names

The following alternative names exist:

Name	Status	Language	Start	End	Authority
GWERTHRYNION	Preferred	Welsh			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 84.
GWRTHEYRNION	Preferred	English			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 84.

Unit associations

We know of no associations with other units.

Unit history

This unit was part of the following units:

Name	Type	Start	End	Authority
RADNORSHIRE	Ancient County			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 84.

Boundary changes

We know of no boundary changes affecting this unit.

Lower level units

This unit contained the following units:

Name	Type	Start	End	Authority
LLANFIHANGEL HELYGEN CP/AP	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 121.
LLANLLYR CP/AP	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 134.
NANTMEL CP/AP	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 163.
RHAEADR AP/CP	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 185.
ST HARMON CP/AP	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 194.