Hi Andrena,
Sorry for the late reply. I managed to trace Robert Williams back to Donegal where he was born. He was a Musician in the 94th Clare Militia having enlisted on 26 Jan 1855. His daughter Elizabeth was born about 1856 but sadly died at the age of around 33.
Trying to trace them from Newport to Kent is another matter & have so far been unable to trace his wife Mary but I think she may have been Mary Ann Spencer, also from Ireland.
I hope this helps.