Hello, I have looked under the name of Discol as there are no entries for o'driscol (and variants) there are 3 entries for an Elizabeth 2 around the age you want one born in Ireland the other in Glamorgan: (Yes = born in Glamorgan , No = born elsewhere)
Glamorgan Family History Society 1841 Census CD
District Name: Swansea Enumeration District: 10 East
Piece: 1424/04 Folio: 020 Schedule: 031
Address: PENTREMAWR
S 25 020 031 PENTREMAWR DRISCOLL ANDREW 25 (c1816)
COPPERMAN IRL
S 25 DRISCOLL ELIZABETH 25 (c1816)
- YES
S 25 DRISCOLL ANN 10 (c1831)
- YES
S 25 DRISCOLL MARY 6 (c1835)
- YES
S 25 DRISCOLL CATHERINE 3 (c1838)
- YES
S 25 DRISCOLL MARGRET 1 (c1840)
- YES
Glamorgan Family History Society 1841 Census CD
District Name: Merthyr Tydfil Enumeration District: 2 Brithdir Hamlet
Piece: 1414/07 Folio: 016 Schedule: 012
Address: BUTE TERRACE
M 02 016 012 BUTE TERRACE DRISKILL JOHN 40 (c1801)
LABOURER IRL
M 02 DRISKILL ELIZABETH 35 (c1806)
- IRL
M 02 017 DRISKILL JOHN 20 (c1821)
LABOURER IRL
M 02 DRISKILL DANIEL 10 (c1831)
LABOURER IRL
M 02 DRISKILL PATRICK 15 (c1826)
- IRL
M 02 DRISKILL MARY 20 (c1821)
- IRL
M 02 DRISKILL ANN 15 (c1826)
- IRL
M 02 DRISKILL BRIDGET 9 (c1832)
- IRL
M 02 DRISKILL CATHERINE 6 (c1835)
- IRL
M 02 DRISKILL ELIZABETH 1 (c1840)
- YES
There are Denee's but spelt Dhenin but no Peter:
This family were enumerated twice in the census:
Glamorgan Family History Society 1841 Census CD
District Name: Swansea Enumeration District: 8 Swansea Town
Piece: 1426/04 Folio: 042 Schedule: 132
Address: ORCHARD STREET
S 35 042 132 ORCHARD STREET DHENIN LEWIS 40 (c1801)
CABINET MAKER JOURNEYMAN YES
S 35 DHENIN ELIZABETH 40 (c1801)
- YES
S 35 DHENIN ELIZA 15 (c1826)
- YES
S 35 DHENIN MARIA 15 (c1826)
- YES
S 35 DHENIN ELIZIER (MALE) 12 (c1829)
- YES
S 35 DHENIN ANN 8 (c1833)
- YES
If you can get more information from what I have given I will have another look for you in 1851
Kind Regards Jen
