Mare-en, but I suspect “may-ren” is not what staff was going for with that post. The post says “mair-en,” and if we assume they meant “mair” should rhyme with “hair,” then mare-en is effectively the same pronunciation.
i read the hobbit in 3rd grade and i thought it was really lame. however i liked bilbo baggins for some reason and i was fully convinced he was some sort of rabbit/mouse thing until i saw the lotr movies and was really, really confused