Fan Casting Crassus Syndulla in Star Wars: Heir To The Chosen One - The Complete Saga

Apparently when Ben Solo fought Jacen Syndulla years ago on Taris, Jacen had a wife that escaped the arena when it blew up and had also given birth to Jacen's son, Crassus, who still believes his father is dead because of the man formerly known as Kylo Ren. Even when he sees his father for the first time on Ryloth, Crassus thinks he and his mother were abandoned by Jacen and fights his father, along with Ben and Anakin Solo.