If you are sure that you have the right family in 1891 then I think collecting the other census entries will help.
You have Thomas at
1901: 51 The Village, Rowley Regis (Thomas Rose head 49 widr)
1891: 51 The Village, Rowley Regis (Thomas Rose head 39, wife Mary)
1881: 90 The Village, Rowley Regis (Thomas head 29, wife Mary)
1871: Rowley Village (Sarah Rose head 50, son Thomas 20 coal miner)
1861: Rowley Village (Thomas head 41, son Thomas 9)
Here is the 1871
Rg10-2993/67
Rowley Village
Sarah Rose,head,w,50,Staffs,Rowley regis
Thomas Rose,son,unm,20,coal miner,Staffs,Rowley Regis
William Rose,son,4,Staffs,Rowley Regis
Israel Morris,son in law,m,30,coal miner,Worcs,Tipton
Hannah Morris,dau,30,nail maker,Staffs,Rowley regis
George Morris,g son,12,Staffs,Rowley regis
James morris,g son,10,Staffs,Rowley Regis
And in 1881
72 Birmingham Rd, Rowley regis
Israil Morris,head,m,40, coal miner,Staffs,Tipton
Hannah Morris,wife,m,40,nail maker,Staffs, Rowley Regis
George Morris,son,unm,21,labourer,Staffs,Rowley Regis
Jane Rose,neice,9,scholar,Staffs,Rowley Regis
(this Jane Rose seems to be daughter of your Thomas, she is there in the 1891 cesus that Ros gave you but missing from the family in the 1881 census so I think that ties the families together)
So, I think these entries all fit together OK.
If you get your Thomas's birth certificate it should give you his place of birth, father's name and occupation and mother's name and maiden name.
(Census information is Crown Copywright)
