I'm not sure who Trevor Holt specifically is in this story without more context. It could be a fictional character created for a particular book, movie, or other form of media.
Well, it depends on how you define 'good'. Trevor Story has shown flashes of brilliance, but his consistency can be a bit up and down. However, when he's on his game, he can be a real force to be reckoned with.
The origin of Kate Kane and Jacob Kane varies in different comic interpretations. Kate Kane is known as Batwoman. Her origin often involves her military background and her decision to take on a vigilante role in Gotham. Jacob Kane, her father, is also an important figure in her story. He has his own military and family - related past that intersects with Kate's journey.
As far as public knowledge goes, no. Trevor Noah has been occupied with things like touring for his stand - up comedy, his work in television and digital media. He may be interested in writing a novel in the future, but there are no signs of it at the moment. He might be more focused on his current platforms where he can reach a large audience and express his views on various topics, from politics to social issues.