Tetia was fatally injured in the attack. The betrayal and massacre caused Licht to despair and his grimoire to turn into a five-leaf clover grimoire. ... Tetia and the child survived, and their descendants lived on in Elysia.

Who is the son of Licht?

Update | Yuno Is Licht's Son Confirmed. In Latest Chapter of Black Clover manga we got the confirmation that Yuno was actually having the soul of Licht's son inside him. After fight with the demon was over and First Wizard King and Licht were about to leave the world.

Does Licht have a kid?

Licht and Tetia fell in love and conceived twins, sharing the hope that they would unite the elves and the humans. They eventually married, but the wedding was ambushed and the elves were massacred. His overwhelming grief over losing his wife and friends corrupted his grimoire, creating a five-leaf clover.