As far as the witnesses go, Augusta is Lily's sister. the other witness John Probert was living at 14 Brynhyfryd Aberaman in Cwmaman in 1901, with his wife Hannah, daughter Mary Ann and 2 boarders Evan and Daniel Jones. Looking at the GRO Index Mary Ann Probert's mother's maiden name was Jones and there's a marriage or Hannah Jones and John Probert in the Merthyr District in Jun 1892. Hannah dies in January 1910
https://newspapers.library.wales/view/3579311/3579314/38/john%20probert%20cwmamanIn 1891 Hannah is living with some of her siblings at 67 Glanaman Rd. By now both their parents must be deceased, with brother David listed as the head. See RG12; Piece: 4448; Folio: 15; Page: 27
In 1881 we have a posisble family for Hannah & John with parents and several siblings at 67 Glanaman Rd, Aberdare. There are 11 children with parents - see RG11 Piece 5324 Folio 142 Page 14 Schedule 1115.
Thomas Jones the father is a colliery Timberman and was born 1837 at Cwmavon and Ann Jones (nee Davies) born 1841 also Cwmavon with 11 children (minus 2 named on the 1871 census) : Thomas b. Taibach 1860, Sarah b. 1863 Cwmavon, David b. 1866 Cwmavon, Mary b.1868 Aberdare, William b. 1870 Aberdare, Hannah b. 1872 Aberdare, Phillip b. 1874 Aberdare, Rhichard b. 1875 Aberdare, John b. 1876 Aberdare, Evan b. 1878 Aberdare and Noah born 1880 Aberdare.
In 1871 we have Thomas and Ann Jones with children Dinah, Thomas, Mary David and William at Forchaman Rd. Dinah and Thomas I think are children of Thomas's first marriage to a Sarah born in Llanelly Carmarthenshire. They must have married about 1856 and Sarah must have died after the 1861 census after the birth of Thomas in 1860. John must have remarried by about 1865.
1871 census is at RG10 Piece 5410 Folio 148 Page 35 Schedule 133
The 1861 census has them at Club Row, Hafod y Porth, Margam in Michaelstone parish (became Cwmavon) where Thomas and wife Sarah and children Dinah and Thomas jnr is at RG9 Piece 4080 Folio 77 Page 4