User blog comment:High King Ithilion/New Map of Middle-earth!/@comment-26453572-20160624150924/@comment-26236093-20160624153135

I myself believe it can be assumed that Oliphaunt and Mûmak are merely alternative terms used for the real creature the Elephant] in Middle-Earth, this conclusion can also be drawn from the note whereby Professor Tolkien states that 'Elephants' appeared during the Battle of Pelennor Fields.