Rifleman William Frederick Thaiss was an English soldier of the British Army who died durin gthe First World War.
He was born in 1890, in Mile End, the son of German tailor Jacob and Annie Maria Theiss, of London. At the time of the 1911 census, Thaiss was employed as a butcher and living with his family at 56 Penge Road, Upton Park.
Thaiss died on 1 September 1916, during the Somme Offensive, while serving with the 3rd Battalion, The Prince Consort's Own (Rifle Brigade), attached from the 8th King's Royal Rifle Corps.
He has no known grave and is commemorated by the Thiepval Memorial.
- Thaiss, William Frederick, cwgc.org. Retrieved 20 October 2012.