Lastly, we have a relatively recent addition to Magneto’s family.
So this just goes to show you that having a powerful mutant father or grandfather does not necessarily guarantee that a child will also be a powerful mutant. In the case of Anya, it is possible that she would have later developed powers but she was already old enough to where that would have happened. With Luna, we have a case where having so many powered family members actually cancelled out her chances of getting powers of her own and left her baseline human, until of course she was exposed to the mists. And with Polaris, it has been stated that she was a latent mutant and wouldn’t have ever manifested her powers without outside help, although her children would like have the potential to gain these powers.