The name of Aragagog’s wife is Mosag. There are a lot of Harry Potter fans who read all of the books and have watched all of the movies. Some would remember all of the characters while there are also others who would only remember the popular ones. Mosag is an Acromantula. Aragog is famous because he is one of the pets that Hagrid raised when he was still a student in Hogwarts.
Ever since then, Hagrid has always been fascinated with creatures that cannot be considered as pets even in the world of wizardry. According to the story, it was Hagrid who also found Mosag for Aragog so that they can form a family in the forest.