Thanks Carlos, a couple of things to note.
Firstly there is already a John Malcolm Drummond as the son of John Drummond, who is presumably meant to be the 12th of Lennox, although he is listed as the 12th Earl of Lennox, but this is probably a mistake.
Secondly for pre-1500 profiles, we should be attempting to find either primary sources or at least good secondary sources, that cite primary sources, and the sources currently on the existing profiles dont fit into either of those categories. Unfortunately the three extra sources you mention are all basically unsourced family trees, and again not really suitable for pre-1500 profiles.
It looks like these profiles really need some more research to work out if the details already on WikiTree are supported by much better sources.