Robert William de Lotbinière-Harwood (October 27, 1826 – June 29, 1897) was a landowner and political figure in Lower Canada and Quebec.
He was a brother of Antoine Chartier de Lotbinière Harwood and Henry Stanislas Harwood, and a first cousin of Sir Henri-Gustave Joly de Lotbinière, who served as the Prime Minister of Quebec and Lieutenant Governor of British Columbia.
Her husband, Antoine Eustache de Bellefeuille MacDonald was a son of Emily McGillis, Mrs Harwood's aunt.
MacDonald was a brother-in-law of William McGillivray, nephew of Simon McTavish and Sir Archibald Campbell, 1st Baronet.
His daughter, Marie-Elizabeth de Lotbiniere-Harwood (1859–1951), married Major-General Sir Sam Steele of Lord Strathcona's Horse.