Names aren't always based on the parents', so if you felt like you wanted to change it to reflect Magura's and the mother's you certainly could, but it's not strictly [i]necessary[/i].  The only particularly meaningful name I could think Magura might give him could be naming him after an animal that's thought to be strong (like Bear or Ox) as sort of a "to give him strength" thing, but if you wanted to keep his name AND have it be meaningful, he could also be named after a deceased family member, like one of his parents' parents, or siblings, or something of that nature.