Tiburcio Arnaiz Muñoz was a Spanish Jesuit priest born in 1865 in Valladolid. After serving in various parishes, he joined the Society of Jesus in 1902. He is primarily remembered for his dedication to the poor and for co-founding the Missionaries of the Rural Parishes in 1922. This religious order was established to support the spiritual and cultural needs of workers and individuals living in remote rural areas. He died in Málaga in 1926 after falling ill while preaching.