St. Gregory of Nyssa (9 March) 335 - 394 Before entering the monastery of his brother, Basil the Great, Gregory was a rhetorician. He became bishop of Nyssa c 371 or 372. Arians accused him of mismanagement and deposed him in 376. He attended the first Council of Constantinople in 381. His best-known works are the Catechetical Oration, The Life of Moses, and the Life of St. Macrina (his sister).
John Bunyan (1628-1688) was an English Christian writer and preacher who was put in prison in England for preaching the gospel. During his time in prison he wrote the famous book "The Pilgrim's Progress", and with that book he converted more people than when he was out preaching in the streets. For some "The Pilgrim's Progress" is a must read for every Christian after the Bible, some even say its such a good book it should be in the Bible.
John Knox (1514-1572) was a Scottish clergyman and a leader of the Protestant Reformation who is considered the founder of the Presbyterian denomination in Scotland. When Mary Tudor ascended the throne and re-established Roman Catholicism, Knox was forced to leave the country. He moved to Geneva and there he met John Calvin, from whom he gained experience and knowledge of Reformed theology. On his return to Scotland he led the Protestant Reformation there.
January 10th: St. William of Bourges: St. William always reputed himself the last among his brethren. The universal mortification of his senses and passions, laid in him the foundation of an admirable purity of heart, and an extraordinary gift of prayer; in which he received great heavenly lights, and tasted of the sweets which God has reserved for those to whom he is pleased to communicate himself.
John Wycliffe (1320-1384) was a professor of Latin and divinity at Oxford who began to profess that that the bible should be available in the common tongue. His followers were known as Lollards (from the Dutch for muttering and/or the Franciscan Lolhard who converted to the Waldensians in the 1370s), although they varied greatly in belief. Wycliffe's Bible was published in 1382.