William Orpen

Sir William Newenham Montague Orpen KBE RA (27 November 1878 – 29 September 1931) was an Irish portrait painter, who worked mainly in London. He was an official war artist during World War I.
Most of these works, 138 in all, he gave to the British Government. They have simple white frames and are kept together in the Imperial War Museum in London. For his war work, he was made a Knight Commander of the Order of the British Empire (KBE) in the 1918 King's birthday honours list.
Otherwise, Orpen was seen at his best in personal family portraits.