Mercurino Arborio, marchese di Gattinara (10 June 1465 – 5 June 1530), was an Italian statesman and jurist best known as the chancellor of the Holy Roman Emperor Charles V.
He was made cardinal of the Roman Catholic Church for San Giovanni a Porta Latina in 1529.
Jan Maius, Jan May, Juan de Mayo, Juan el Mayo, Jan Vermeijen, Jan Cornelisz. Vermeijen, Jan Vermeyen, Jan met den Baard, Juan Barba Longa, Barbalonga, El Barbudo