Thank you for your posting. I am not sure if you have the 1881 Census details. There were 3 possible matches with the information you gave, but only one with a father named "Daniel":
   Dwelling:   10 Whitcombe St
   Census Place:   Aberdare, Glamorgan, Wales
   Source:   FHL Film 1342281     PRO Ref RG11    Piece 5321    Folio 117    Page 42
   Marr   Age   Sex   Birthplace
Daniel LLOYD   M   41    M   Bredon, Worcester, England
   Rel:   Head
   Occ:   Railway Engine Driver
Emma LLOYD   M   42    F   Cardiff, Glamorgan, Wales
   Rel:   Wife
Richard LLOYD   U   19    M   Cardiff, Glamorgan, Wales
   Rel:   Son
   Occ:   Railway Labourer
Maria LLOYD       14    M   Newport, Monmouth, England
   Rel:   Daur
   Occ:   Scholar
George LLOYD       12    M   Pontypool, Monmouth, England
   Rel:   Son
   Occ:   Scholar
David LLOYD       9    M   Aberdare, Glamorgan, Wales
   Rel:   Son
   Occ:   Scholar
Rose Ann LLOYD       7    F   Aberdare, Glamorgan, Wales
   Rel:   Daur
   Occ:   Scholar
Dan. LLOYD       5    M   Aberdare, Glamorgan, Wales
   Rel:   Son
   Occ:   Scholar
They were not listed on the 1861 Census but I found these on the 1861 Census. These are possible relations:
             Glamorgan Family History Society 1861 Census CD
4066 1861 CENSUS OF MAESYDRE (PART). REF.R.G.9/4066, E.D.19.                                                                         
Piece: 4066      Folio: 099     Schedule: 086
Address: GLOUCESTER ST.         
LLOYD RICHARD              HD M  43   RAILWAY INSPECTOR         
                                      WOR BREDON                       (c1818)
LLOYD MARY                 WI M  42   -                         
                                      WOR BREDON                       (c1819)
LLOYD ROSEHANAH            DA U  19   -                         
                                      WOR BREDON                       (c1842)
LLOYD RICHARD              SO U  17   RAILWAY SIGNALMAN         
                                      WOR BREDON                       (c1844)
TRAP MARIA                 CL U  38   -                         
                                      WOR BREDON                       (c1823)
I also found a marriage 4th April 1836 in Aberdare:
David Lloyd Grooms Parish Aberdare
Ann Gwyn Brides Parish Aberdare
This information is taken from the Glamorgan Marriage Index  1569 - 1837 (which is in PDF format)
I could not see an entry for Daniel and Emma.
I hope this helps you a little.
Regards Jen 
