John Hay (1546–1608), Latinized Joannes Haius or Hayus, was a Scottish Jesuit scholar and educator. Born to the Hays of Delgatie, he was a relative of Edmund Hay. In 1576 he took part in a disputation against a Protestant theologian in Strasbourg. For some time he was attached to the Collège de Tournon, engaging in controversy with the Huguenots of La Rochelle, in particular Jean de Serres. He later moved to the Low Countries, where he published Latin translations of works from and about Jesuit missions overseas.