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• Total Population 1801 to 1901: Population fell from 36 in 1801 to 24 in 1901.
• Occupational Structure in 1831: Out of 11 males aged 20 and over, 7 were Agricultural Labourers.

Here we are presenting statistics for a historical unit, which may have changed its boundaries significantly during the period covered.

Alternative names

The following alternative names exist:

Name	Status	Language	Start	End	Authority
LLANDEFAILOG TRE GRAIG	Preferred	English			1851 Census of Great Britain, Table [1], 'Population Abstract'.
LLANDEFAELOG TREGRAIG	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'.
LLANDEFAILOGTREGRAIG	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'.
LLANDEFAILOG TREGRAIG	Alternate	English			1891 Census of England and Wales, Table 2, 'Area and Population in Registration Districts and Sub-Districts and in Civil Parishes'.
LLANDEFAILOG TREYR GRAIG	Alternate	English			1831 Census of Great Britain, Table [1], 'Population Abstract'.

Unit associations

This unit was associated with the following other units:

Nature of association	Other unit involved	Type of unit	Authority
was succeeded by	LLANDYFAELOG TRER GRAIG EP	Ecclesiastical Parish	M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 109.

Unit history

This unit was part of the following units:

Name	Type	Start	End	Authority
BRECKNOCKSHIRE	Ancient County			1851 Census of Great Britain, Table [1], 'Population Abstract'.
BRECKNOCK RegD/PLU	Poor Law Union/Reg. District			1851 Census of Great Britain, Table [1], 'Population Abstract'.
BRECKNOCK RSD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
LLANGORSE	Registration sub-District			1881 Census of England and Wales, Table 4, 'Area, Houses, and Population of Civil Parishes in the several Registration Sub-Districts in 1871 and 1881'.
PENCELLI Hundred	Ancient District			1831 Census of Great Britain, Table [1], 'Population Abstract'.

Boundary changes

We know of no boundary changes affecting this unit.

Lower level units

We know of no units which were contained within this unit.