Jones Marriages ? Swansea

[Valry]

The dreaded Jones - can anyone help please. Looking for marriages of:

William George Jones b 1858
Mary b 1861
John b 1865
Elizabeth b 1865

Father Thomas a Carpenter/Joiner - Mother Hannah

All born Haverfordwest but moved to Swansea between 1871 and 1877 (have marriage of sister Martha to Charles Herbert at the Parish Church of Swansea in 1877)

In 1881 William & John still at home in 'Honest Lawers Court' in Swansea
In 1891 Thomas & Hannah living Orchard St. Swansea.

Cannot find Mary on the 1881 census but believe Elizabeth was living with her sister Martha Herbert in Pembroke Dock although she is listed as a servant.

Any help would be appreciated - many thanks - Valry