Retpara,
The Thomas Winter registered 1862, June Qtr, Merthyr Tydfil 11a 328, Merthyr Tydfil was registered as a Winters. Have checked the original image and it is Winters - not a transcription error.
Free BMD has the death registration of Thomas Winter, Dec 1862, Merthyr Tydfil 11a 177. I think this is the Thomas Winter registered birth Jun, 1861, Merthyr Tydfil, 11a 334. Checked the Parish Burial records for Merthyr Tydfil and found a Thomas Winter, buried 2/12/1862, age 17mths, Abercannaid.
Was looking to check for possible Baptismal records for a Thomas Winter but the FHS Transcribed Index only goes up to 1837.
Like Cardiff, can't find hide nor hair of a Thomas that fits the bill in 1871 or, indeed, any members of the 1861 Joseph Winter family.
regards