Like several other people, I really needed to know wtf was meant by Magneto saying the names Billy and Tommy were “from the Vision’s side of the family” in this panel. Various wikis weren’t helping me out so I dug up the actual issue, Vision and the Scarlet Witch #12.
Basically, it’s complicated:
Other salient facts about this issue I would like to bring to your attention: Wanda is attended during the birth by none other than Sorcerer Supreme, Stephen Vincent “Doctor” Strange.
I had no idea he was an OBGYN.