Roger ---> Ace
WB ---> Weevil
Big Mom ---> Plenty
Kaidou ---> Yamato
Dragon ---> Luffy
Mihawk ---> Possibly Imu
Garp ---> Dragon
Sengoku ---> Corazon
Akainu ---> Hibari
Kong ---> Possibly Jozu or whatever
Shanks ---> Uta
... etc
So expect Blackbeard to have a Child as well (Either Biological, Raised or Self-Proclaimed)
And that's who 10th Titanic Captain is imo