POSS GRO birth BUCKINGHAM, CATHERINE
mother’s maiden name JAMES
GRO Reference: 1878 M Quarter in SWANSEA Volume 11A Page 646

1881UKC William Buckingham and family, 2 pages; Wales Census > Caernarvonshire > Ynyscynhaiarn > District 8a; image 19-20 of 81 @ancestry.com; Source Citation: Class: RG11; Piece: 5553; Folio: 113; Page: 19; Line:  ; GSU roll: 1342333.; Civil Parish: Ynyscynhaiarn; County/Island: Caernarvonshire; Registration district: Festiniog; Sub-registration district: Tremadoc; Street address: 12 Railway Place
William Buckingham 43 b Barmouth, Merionethshire
Mary Buckingham 40 b Swansea, Glamorgan
Elizabeth A. Buckingham 11 b Swansea, Glamorgan
Mary E. Buckingham 8 b Swansea, Glamorgan
Catherine Buckingham 3 b Swansea, Glamorgan

1891UKC WilliamBuckinghamFam; Wales Census Caernarvonshire Ynyscynhaiarn District 08; image 6 of 78 @ancestry; Source Information: Ancestry.com. 1891 Wales Census [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2005.
Original data: Census Returns of England and Wales, 1891. Kew, Surrey, England: The National Archives of the UK (TNA): Public Record Office (PRO), 1891.
Civil Parish: Ynyscynhaiarn
Ecclesiastical parish: Ynyscynhaiarn
Town: Portmadoc
County/Island: Caernarvonshire; Country: Wales
Registration district: Festiniog
Sub registration district: Tremadoc
ED, institution, or vessel: 8
Piece:4649; Folio: 6; Page Number: 5
Household Members:
William Buckingham 50 b Barmouth, Merionethshire
Mary Buckingham 49 b Swansea, Glamorgan
Catherine Buckingham 13 b Swansea, Glamorgan

Could this be her?
POSS FreeBMD Marriages Sep 1894 (>99%)
Buckingham Catherine Neath 11a 1177
James Thomas Phillip Neath 11a 1177
Jones Daniel Neath 11a 1177

POSS child GRO Birth JAMES, VERA HILDA
mother maiden name BUCKINGHAM
GRO Reference: 1895 D Quarter in CHEPSTOW Volume 11A Page 4
also
JAMES, JAMES WILLIAM
mothers amiden name BUCKINGHAM
GRO Reference: 1896 J Quarter in NEATH Volume 11A Page 862
also
JAMES, SELWYN HOWARD
mothers maiden name BUCKINGHAM
GRO Reference: 1898 M Quarter in PONTYPOOL Volume 11A Page 180
also
JAMES, THOMAS FREDERICK BUCKINGHAM
mothers maiden name BUCKINGHAM
GRO Reference: 1899 S Quarter in NEWPORT MON Volume 11A Page 171
also
JONES, HUBART WILLIAM GEORGE BUCKINGHAM
GRO Reference: 1900 S Quarter in ABERGAVENNY Volume 11A Page 55
also
JAMES, LESLIE FOSTER BUCKINGHAM BUCKINGHAM
GRO Reference: 1900 D Quarter in NEWPORT MON Volume 11A Page 180
also
JAMES, MARY ELIZABETH
mothers maiden name BUCKINGHAM
GRO Reference: 1901 S Quarter in NEATH Volume 11A Page 912
also
JAMES, EDRA IRENE
mother maiden name BUCKINGHAM
GRO Reference: 1902 S Quarter in NEWPORT MON Volume 11A Page 201