For Protestant Christians, Luther made clear that the Bible is the "Sola Skriptura," God's only book, in which He provided His revelations to the people and which allows them to enter in communion with Him. Catholics, on the other hand, do not base their beliefs on the Bible alone.
In the Middle Ages, a Yeoman was a type of social class that consisted of men who were attendants in noble households. They were also, in military contexts, a rank in the military, most specifically the third rank.