system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Why does Mr.Fantastic and Doom's children have the same name ?
gpt
Valeria von Doom, who used the code name Marvel Girl, was from an alternate universe where Reed Richards and Dr Doom switched bodies and never unswitched. So while she believed herself to be the daughter of Doom, she was really the daughter of Reed Richards as Doctor Doom.

Valeria Richards, is the second child of Reed and Sue. They were complications with the birth, and only Doctor Doom was around at the time to make sure the baby was born safely. He did so in exchange for the right to name the child after his lost love Valeria.

There were some implications that the alternate universe that Valeria von Doom was from was actually some sort of weird cosmic manipulation by Franklin Richards, and that Valeria Richards is some sort of reincarnation of Valeria von Doom, who was also then a reincarnation of a child Sue had that miscarried years prior.