Major-General Arthur Robert MacDonnell (1835-1900) R.E., J.P., was an Anglo-Irish soldier who served with the Royal Engineers during 1868 Expedition to Abyssinia under Sir Robert Napier. Born at Dalkey, Co. Dublin, the youngest son of Richard MacDonnell, Provost of Trinity College, Dublin. He studied at the Royal Military Academy, Woolwich, and was gazetted into the Royal Engineers in 1854.