If John was b. Camberwell, the following may be a relative; not a common surname:
UK, Soldiers Died in the Great War, 1914-1919
Name: William Tooney
Death Date: 14 Aug 1917
Death Location: France & Flanders
Enlistment Location: 522, Old Kent Road, S.e.
Regiment: London Regiment
Battalion: 1st (City of London) Battalion (Royal Fusiliers)
Type of Casualty: Killed in action
Theatre of War: Western European Theatre
Comments: Formerly 3334, R.W. Kent Regt.