Truthfully, when the topic of changing their name cropped up, it was Draco who was adamant that he gave up the Malfoy name, willing to change it to Lupin or Granger or any combination of the two. She, however, needed a bit more time to come around. Giving up the name Granger at first felt like she was betraying her parents, but they’d live on through her and through her child, and that was all the reassurance she needed. She was always destined to be a Lupin.