Hello Nia
My Grandfather, William Hugh Williams, was in the Royal Welch Fusiliers and fought in WW1 in Gallipoli. He was born in Pwllheli, Carnarvonshire, but he married my Grandmother who was born in Kerry, Montgomeryshire (Powys now) and they lived at 8 Cemetery Square, Llanidloes.
William Hugh Williams survived the War only to have a fatal accident in the RWF Headquarters in Victoria Avenue, Llanidloes in 1926 he was 29 years old and left a Widow and five children.
I have no proof but I think William's father Robert Williams came down from Pwllheli to join the RWF and lived next door at No.9 Cemetery Square. I have a photograph VERY creased of William in uniform with Shire Horses.
According to his Obituary there was a firing party from 'A' Company RWF under the command of Lieut.R.B.S.Davies at his funeral. The bearers were Ptes.Ll Morris, John Mills, P.Evans, J.H.Rowlands, R.D.Jones, and O.Benbow.
My Grandmother's maiden name was Mills her mother was Sarah Mills. These Mills are the Mills of Radnorshire.
I hope this information has been helpful to you ~ good luck with your project.
Best wishes
Shirley