Kamala Stark

Kamala Aredvi Khan Stark (b. December 23rd, 2008) is the daughter of Anahita and Tony Stark, although she was also adopted at birth by Bruce Wayne and the (adopted) (half-)sister of the other children of the Stark-Wayne Family.
Kamala was conceived while Tony and Anahita were being held captive by Zadran's Ten Rings, as Tony's heat was triggered by Anahita's powers as a Djinn and the only way to end it was for him to conceive a child. Anahita later died in Tony's escape attempt, making Kamala the last of the Djinn, since the others had all already died off. Because of this, Tony decided to keep Kamala, and he and Bruce agreed that they would raise her together.
Tony's pregnancy with Kamala was rather busy, as he also started his Iron Man journey throughout it. Despite this, Kamala was born healthy on December 23rd, 2008, six days before her younger adopted half-brother/maternal step-brother, Damian Wayne, the son of Bruce and Talia al Ghul.