Franciscus Sonnius (12 August 1506 – 30 June 1576) was a theologian during the time of the Catholic Reformation, the first bishop of 's-Hertogenbosch and later the first bishop of Antwerp. His family name was Van de Velde, but in later years he called himself after his native place, Son in Brabant. He came from the same noble family as philosopher Heymeric de Campo. The family has three golden mill-irons in their coat-of-arms, a sign that is depicted on the chair of the first bishop in the cathedral of Antwerp.