Anglesey narrows things down a bit.
If your Thomas was born in November 1881, there is a good chance that his
parents were married in the 1881 Census. There are only three Thomas Hughes
"of breeding age" married to an Ellen (or variants) on the Island in 1881.
(I'm sorry I don't have 1891 for Anglesey)
Details below.
Of the three "Ardd Gron" is unlikely as they already have a son called Thomas
(although he may have died and had a brother named after him)
"Tynycaeau" is doubtful as this man owns his own farm.
Leaving "Bryn yn Eithen", Bodedern as the best bet.
This isn't conclusive, but it would be worth asking on the Anglesey list for
an 1891 lookup for Bodedern, which would confirm or disprove this hypothesis.
(Just in case my hypothesis is correct I have also included Thomas of Bryn
Eithen's Father, Aunt and brother's details at the end)
Regards
Alwyn
Dwelling: ArddGron
CensusPlace: Llanddona, Anglesey, Wales
Thomas HUGHES / M / 25 / M / Llanddona, Anglesey, Wales/ Rel: / Head/ Occ: /
Labourer
Ellen HUGHES / M / 23 / F / Llanddona, Anglesey, Wales / Rel: / Wife
Thomas HUGHES / / 6 / M / Llanddona,Anglesey, Wales / Rel: / Son
William HUGHES / / 4 / M / Llanddona,Anglesey, Wales / Rel: / Son
Ann E. HUGHES / / 2 / F / Llanddona,Anglesey, Wales / Rel: / Daur
Margaret JONES / / 1 / F / Caernarvon,Wales / Rel: / Visitor
Dwelling:Tynycaeau
CensusPlace: / Amlwch, Anglesey, Wales
Marr / Age / Sex / Birthplace
Thomas HUGHES / M / 43 / M / Amlwch, Anglesey, Wales/ Rel: / Head/ Occ: /
Farmer
Ellin HUGHES / M / 37 / F / Llanfigael, Anglesey, Wales / Rel: / Wife / Occ:
/ Domestic Service
Margaret HUGHES / / 14 / F / Amlwch,Anglesey, Wales / Rel: / Daur/ Occ: /
Scholar
Elizabeth HUGHES / / 9 / F / Amlwch,Anglesey, Wales / Rel: / Daur/ Occ: /
Scholar
Richard HUGHES / / 7 / M / Amlwch,Anglesey, Wales / Rel: / Son/ Occ: /
Scholar
Mary HUGHES / / 5 / F / Amlwch,Anglesey, Wales / Rel: / Daur/ Occ: /
Scholar
Cathrine HUGHES / / 3 / F / Amlwch,Anglesey, Wales / Rel: / Daur
Anne HUGHES / / 5 m / F / Amlwch, Anglesey, Wales/ Rel: / Daur
Dwelling:/ Bryn Yn Eithen
CensusPlace: Bodedern, Anglesey, Wales
Thomas HUGHES / M / 27 / M / Cylched, Anglesey, Wales/ Rel: / Son (Head)/
Occ: / Ag Lab
Ellinor HUGHES / M / 32 / F / Llanfair Neubwll, Anglesey, Wale / Rel: / Wife
/ Occ: / Wife
John HUGHES / / 5 / M / LlanfairNeubwll, Anglesey, Wales / Rel: / Son/
Occ: / Son
William HUGHES / / 4 / M / LlanfairNeubwll, Anglesey, Wales / Rel: / Son/
Occ: / Son
Ellinor HUGHES / / 8 m / F / Bodedern, Anglesey, Wales/ Rel: / Daur/ Occ: /
Daur
If my hypothesis is right here are his parents details:
Dwelling: Bryn Yn Eithen
Census Place: Bodedern, Anglesey, Wales
Hugh THOMAS W 60 M Ceirchiog, Anglesey, Wales
Rel: Head
Occ: Ag Lab
Margaret THOMAS U 82 F Cylched, Anglesey, Wales
Rel: Sister
Occ: Sister
John THOMAS U 30 M Cylched, Anglesey, Wales
Rel: Son
Occ: Ag Lab