Father & son groups, father: 2nd Corporal Robert Parker Tredinnick, 23 Field Company, Royal Engineers, with full service history, son: William P. Tredinnick, 6th London Regt., KIA 22/10/1916, commemorated on the Ypres Menin Gate Memorial, see history

Father & son groups, father: 27916 2nd Corporal Robert Parker Tredinnick, 23 Field Company, Royal Engineers, Queen's South Africa, 3 bars: Belfast, Laing's Nek & Defence of Ladysmith, Kings South Africa Medal, Long Service & Good Conduct Medal (Sergeant on medal) with full service history, son: William P. Tredinnick, served with the 6th London Regiment, killed in action 22nd October. 1916, he is commemorated on the Ypres Menin Gate Memorial, Belgium, see history