Alfonso Navarrete was a Spanish Dominican friar and missionary who served in the Philippines and Japan during the early 17th century. Born in Logroño around 1571, he joined the Order of Preachers and later traveled to the Far East to minister to various communities. In Japan, he became known for his extensive social work, particularly his efforts to care for abandoned children. During the intense anti-Christian persecutions under the Tokugawa Shogunate, he was arrested and eventually executed by beheading in the Ōmura Domain in 1617.