Another important factor was that during the Middle Ages a large proportion of the population would have been illiterate and so pictures on a sign were more useful than words as a means of identifying a public house. For this reason there was often no reason to write the establishment's name on the sign and inns opened without a formal written name, the name being derived later from the illustration on the pub's sign.
From where did pubs without written names derive their names?
the illustration on the pub's sign