Saint isidore of Seville c.560-636
Isidore was raised and educated in Seville and he succeeded his brother, Leander, as bishop of the city following the latter’s death around the year 600. He held this position for over three decades, during which time he became noted for his intellectual skills. Isidore famously spent the last two decades of his life compiling the Etymologies, an encyclopaedia of knowledge collected from hundreds of classical sources. Comprised of 20 volumes and divided by subject, it covers a wide range of topics from animals and cities to lore of the late classical world. It was the most used textbook in the Middle Ages.
Isidore was nominated as the patron saint of the internet by the late Pope John Paul II, although the Vatican has not made this official yet
Isidore was officially canonised as a saint in 1598