Arthur Guinness, 1st Baron Ardilaun, Irish businessman, philanthropist, and politician (b. 1840)

Arthur Edward Guinness, 1st Baron Ardilaun, 2nd Baronet (1 November 1840 – 20 January 1915), known as Sir Arthur Guinness, Bt, between 1868 and 1880, was an Irish businessman, politician, and philanthropist, best known for giving St Stephen's Green back to the people of Dublin.