Given your THOMAS's turning up in Blaina / Abertillary

These may be your HOLDERS and Roy

Name: William H Holder
Year of Registration: 1913
Quarter of Registration: Jul-Aug-Sep
Mother's Maiden Name: Thomas
District: Bedwelty
County: Monmouthshire
Volume: 11a
Page: 206

Name: Irene M Holder
Year of Registration: 1915
Quarter of Registration: Apr-May-Jun
Mother's Maiden Name: Thomas
District: Bedwelty
County: Monmouthshire
Volume: 11a
Page: 269

Name: Leslie R Holder
Mother's Maiden Surname: Thomas
Date of Registration: Jan Feb Mar 1917
Registration district: Bedwellty
Registration county: Wales
Volume Number: 11a
Page Number: 222

Name: Iris M Holder
Mother's Maiden Surname: Thomas
Date of Registration: Oct Nov Dec 1918
Registration district: Bedwellty
Registration county: Wales
Volume Number: 11a
Page Number: 197

Name: Hubert T Holder
Mother's Maiden Surname: Thomas
Date of Registration: Jan Feb Mar 1921
Registration district: Bedwellty
Registration county: Wales
Volume Number: 11a
Page Number: 230

Name: Reginald G Holder
Mother's Maiden Surname: Thomas
Date of Registration: Apr May Jun 1923
Registration district: Bedwellty
Registration county: Wales
Volume Number: 11a
Page Number: 229