Scottish Protestant reformer John Knox (1514-1572) is the author of the work of vile misogyny, The first blast of the trumpet against the monstruous regiment of women (1558). In the book, Knox rails against the idea of women having authority over men, particularly in the case of queens. He calls them "weak", "sick", "impotent", "foolish", "mad", "frenetic", "impatient", "feeble", "inconstant", "cruel", "corrupted", and so forth. Mary I of England was "that cursed Jezebel" and "horrible monster", "bloody tyrant"; Mary of Guise was "that crafty dame". He called for the people to rise up to murder both of them. He also hates "the odious nation of Spaniards", Catholics ("pestilent and detestable"), and frankly quite a lot of other things.
In a comment on an answer to an earlier question, I said that John Calvin (Knox's mentor) disapproved of what Knox had written. On reflection I realize that I don't actually have any evidence for that. I was misremembering a different comment by Calvin where he said "moderate your rigor" to Knox, but that was in the context of tolerating variations in the conduct of public worship (Knox absolutely hated any deviation from his ideas).
What did Calvin actually think about the Monstrous regiment? - both in terms of the political difficulty it created, and in terms of the actual content (that is, did he agree or disagree with the basic sentiments, independently of the trouble the book caused?).