John Willock (or Willocks or Willox) (c. 1515 – 4 December 1585) was a Scottish reformer. He appears to have been a friar of the Franciscan House at Ayr. Having joined the party of reform before 1541, he fled for his life to England. There he became noted as a zealous and taking preacher. This led to his arrest for heresy under an Act of Henry VIII., "for abolishing diversity of opinion" in matters of religion. He was found guilty of preaching against purgatory, holy water, priestly confession, and prayer to the saints, and of holding that priests might lawfully be married, he was for some time confined in the Fleet prison. After the accession of Edward VI he was chaplain to Henry, Duke of Suffolk, who had married King Henry's niece, and is best known as the father of Lady Jane Grey. He pr