Details of Daniel DAVID, possibly the brother of Llewelyn DAVID

1851: Piece: 2460; Folio: 88; Page: 11
Abernant Y Groes Uchaf, Aberdare, Merthyr Tydfil
DAVIES, Daniel, head, unmarried, 40, farmer, Merthyr Glam
DAVIS, William, lodger, 54
WILLIAM, Alice, niece, Aberdare Glamorganshire
The remainder of the household is made up of servants

1861: RG9; Piece: 4070; Folio: 46; Page: 8;
Abernant Y Groes Ishaf, Aberdare, Cwmbach
DAVID, Daniel, head unmarried, 57, gentleman farmer, Merthyr Tydfil Glam
The remainder of the household is made up of servants

1871: RG10; Piece: 5411; Folio: 15; Page: 25
Abernant-Y-Groes Farm, Aberdare
DAVID, Daniel, head, 60, farmer of 52 acres employing 4 men, Merthyr Glam
DAVID, Gwenllian visitor, 20
DAVID, Margaret visitor, 18
The remainder of the household is made up of servants

1881: Piece: 5325 Folio: 29 Page: 39
Abernanty Groes Uchaf Farm, Aberdare
DAVID, Daniel, head, single, 71, farmer, Merthyr Tydfil Glam
DAVID, Llewelyn, brother, widower, 74, retired coal miner, Merthyr Tydfil Glam
THEOPHILUS, Elizabeth, niece, single, 38, housekeeper, Aberdare Glam
BEDDOE, Matty, niece, single, 16, pupil teacher, Aberdare Glam
The remainder of the household is made up of servants

1891: RG12; Piece: 4448; Folio 46; Page 27
Abernanty Groes House, Pond Place, Aberdare, Cefnpennar
DAVID, Daniel, head, single, 81, living on own means, Merthyr Glam
THEOPHILUS, Elizabeth, niece, single, 48, Aberdare Glam
DAVIS, William S, visitor, 14
DAVIS, Edward E, visitor, 11
The remainder of the household is made up of servants

Now for the 1841 census…

1841: Piece 1420; Book: 2; Folio: 7; Page: 8; Line: 15
Abernant Y Gros Uchaf, Aberdare, Merthyr Tydfil
DAVID, William 65, farmer
DAVID, Gwenllian 65 Glamorgan
DAVID, Daniel 30 Glamorgan
DAVID, Catherine 25 Glamorgan
DAVID, Gwenllian 20 Glamorgan
BOWEN, John 30

Note the address Abernant Y Groes or Abernant Y Gros Uchaf for Daniel throughout the census. Moreover, in 1851 Llewelyn was also living at Abernant Y Gros Uchaf. From this I would be inclined to think that the father of both was William.