Warning: Spoilers for Batgirl #3!The family tree for one of Batman’s archenemies is more intricate than most readers may think, and it leads to the forgotten character, Nyssa al Ghul. Bruce Wayne has been in a feud with Ra’s al Ghul ever since the latter debuted in 1971, and that feud led to Batman falling in love with Talia, his daughter. That affair, in turn, birthed Batman’s son, Damian Wayne, the latest Robin. The al Ghul family has become vital to Batman lore.

https://screenrant.com/batman-ras-al-ghul-daughters-nyssa-talia-explainer/