I'm not sure specifically who 'Tamar Judah' is without more context. There could be many people named Tamar, and the 'Judah' might be related to a family or place in the story. It could be a very specific narrative within a particular community, culture or even a family's own history.
Given the title 'chapman cohen an old story', Chapman Cohen might be the protagonist of the story, someone who has lived through certain events in the past. He could be an individual with a unique perspective on an old - time situation. Or perhaps he's a writer or raconteur who has crafted a narrative about an event or period long ago. Without more context, it's difficult to be more precise about his identity.
The story of Judah Ben Hur is a mix of fact and fiction. Some parts might draw inspiration from real history, but much of it has been creatively crafted for entertainment purposes. We can't simply say it's completely true or false.
Twitter fiction is basically short stories or creative writing shared on the Twitter platform. They're often concise and to the point due to the character limit.
I have no idea. Maybe you could provide more information about who or what Hillary Cohen is related to. Then it would be easier to tell if she's fictional or not.
As I don't know the specific 'Tamar Judah story', I can't say for sure. But generally, a story's main plot could involve Tamar Judah facing some sort of conflict, like a struggle within the family, or a problem in the community. It might be about her achieving a goal, or learning an important life lesson.