some similarities: the clothes the drinking and merrymaking in the mead hall that there were battles between Beowulf grendal and the mom (even though they were not the same fight scenes as the poem)...
Well for one Grendels mother was not an attractive woman, she was a monster like Grendel. Beowulf never slept with Grendels mother, and the dragon he fights in the end of the movie is not his son its...
The production companies were Paramount Pictures in association with Shangri-La Entertainment and ImageMovers. For more information, see the page link, further down this page, listed under Sources...