Infante John, also known as John of Portugal, was a Portuguese royal born in 1495. He was the son of King Manuel I of Portugal and Queen Maria of Aragon. John was a significant figure in the early 16th century, known for his role in the Portuguese court and his connections to various European royal families. John's life was marked by his marriage to Catherine of Austria, which strengthened ties between Portugal and the Habsburg dynasty. He served as a governor of Portuguese India and was involved in the exploration and expansion of Portuguese territories. His contributions to the monarchy and exploration efforts were notable during this period.