We know that Tywin sent Tysha to the place ' where whores go '. We learn it from Jaime who doesn't want to lie to his brother anymore. Only thing we know for sure is the fact that she was raped by a lot of soldiers.
Many suggest that daughter of the sailor from Bravoos is actually Tysha who somehow managed to survive. but let's focus on her pretty much obvious pregnancy. She gives a birth to a dwarf child. She tells girl some mysterious dwarf father and turns her in to some kind of comedian troop.
Penny meets there Oppo with who she becames the BFF. Could it be that Tyrion was traveling with his daughter fro this whole time and knows nothing about it ?