As a Modern marker for the most of the last 20 years (not marking this year) I have regularly given full marks to 'one interpretation is xxxx while another interpretation is yyyy' type responses where the student clearly is able to identify that there are different views about something and that they can't remember the exact name of the historians. It is nice to read the name of the historian but if you don't have the names correct or mentioned at all it won't be held against you, at least in my experience.