Available Themes

Click on the hyperlinks for direct access to key graphs and tables.

• Total Population 1801 to 1971: Population fell from 156 in 1801 to 77 in 1971.
• Occupational Structure in 1831: Out of 49 males aged 20 and over, 29 were Agricultural Labourers.
• Occupational Structure in 1881:

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
TREGAEAN	Preferred	English			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 210.
TREGAIAN	Alternate	English			1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
TREGAYAN	Alternate	English			1851 Census of Great Britain, Table 3, 'England and Wales. Houses and Population enumerated in 1851 in Registration Counties'.

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
ANGLESEY	Ancient County			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 210.
ANGLESEY RegD	Poor Law Union/Reg. District		01 Jan 1885	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'.
ANGLESEY PLU/RegD	Poor Law Union/Reg. District			1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
ANGLESEY RSD	Sanitary District			1891 Census of England and Wales, Table 4, 'Area and Population in Rural Sanitary Districts'.
DINDAETHWY Cmt	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 210.
DINDAETHWY Hundred	Ancient District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 210.
LLANGEFNI	Registration sub-District			1911 Census of England and Wales, Table 5, 'Registration Counties, Districts and Sub-districts with their constituent civil parishes. - Urban or Rural District in which each parish is situated; Area; families or separate occupiers, and population, 1901 and 1911; and population enumerated in Institutions, large establishments, and on vessels, &c., 1911'.
MALLTRAETH Hundred	Ancient District			1831 Census of Great Britain, Table [1], 'Population Abstract'.
MENAI Hundred/Cmt	Ancient District			1831 Census of Great Britain, Table [1], 'Population Abstract'.
TWRCELYN RD	Local Government District			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 210.

Boundary changes

This unit was affected by the following changes:

Date	Type of change	Other unit involved	Area transferred	Authority
24 Mar 1888	was enlarged by gaining part of	LLANBEDR GOCH CP/Ch	Carrog, Carrog Cores, and Glanrafon Farms Houses in 1891: 3.	1891 Census of England and Wales, Table 14, 'Changes in the Areas of Civil Parishes effected by Local Government Board Orders under the Provisions of the Divided Parishes Acts of 1876 and 1879, or by the Act of 1882'.; LGBO 21371

Lower level units

This unit contained the following units:

Name	Type	Start	End	Authority
ERDDREINIOG Tn	Parish-level Unit			M. Richards, Welsh Administrative and Territorial Units (Cardiff: University of Wales Press, 1969), p. 66.