The following sources have potential matches based on the name and other information associated with this record. They may or may not be connected to this person but are provided for your further research
The regimental War Diaries are held at The UK National Archives and as of April 2020 have been made available for free download*. They are the official unit war diaries for the British Army that contain records of daily activities, including casualties. They are not personal diaries.
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Rifleman William Henry Williams
London Regiment (London Irish Rifles)
Date of death: 07/08/1917
Cemetery: YPRES (MENIN GATE) MEMORIAL
Son of Mrs. Sarah Williams, of 5, Lower Alma Place, Pentre (Rhondda), Glam.
Private Mathias Williams
Date of death: 27/08/1917 (aged 28)
Cemetery: TYNE COT MEMORIAL
Son of the late Mr. and Mrs. Samuel Williams, of 90, Pentre Estyll, Swansea.
Private Albert Llewelyn Williams
Duke of Cornwall's Light Infantry
Date of death: 25/04/1917 (aged 23)
Cemetery: DOIRAN MEMORIAL
Son of William and Mary Jane Williams, of Pentre (Rhondda), South Wales, Glam.