William Coleman was born in Aughnacloy, County Tyrone. William Coleman enlisted in Comber, County Down. Rifleman William Coleman was serving with the 13th Battalion of Royal Irish Rifles when he was killed in action in France in 16 August 1917. Rifleman William Coleman is also commemorated on Comber War Memorial.
The Tyne Cot Memorial to the Missing forms the north-eastern boundary of Tyne Cot Cemetery, which is located 9 kilometres north east of Ieper town centre, on the Tynecotstraat, a road leading from the Zonnebeekseweg (N332). The names of those from United Kingdom units are inscribed on Panels arranged by Regiment under their respective Ranks. The names of those from New Zealand units are inscribed on panels within the New Zealand Memorial Apse located at the centre of the Memorial.