Saint Aloysius Gonzaga (1568 - 1591) was an Italian Jesuit.
The eldest son of a noble family, he was expected to be a soldier. But to the horror of his family, he renounced his inheritance and became a Jesuit with the aim of being a missionary. His confessor was St Robert Bellarmine. He died after contracting the plague through his service of the stricken in Rome. You can read about his life here.
His martyrology entry reads:
At Rome, St. Aloysius Gonzaga, of the Society of Jesus, most renowned for his contempt of the princely dignity, and the innocence of his life.