Pls help me? wat's this book?

its like about the early jews and how a man named jesus came into the town preforming miracles, and the protagonist of the story is like a teen boy who lives with his grandmother? and his sister hu is blind or something.. and theyre all jewish i think. i think the books title has something to do with an arrow? a gold one?? idk theres german barbarians and i think he joins the barbarians for a time.. and i think their dad is either in jail or dead.. and i think the sister is all weird cus she spent all night watching her dad die on the cross and she got pneumonia bcus he took the blame for their uncle hu didnt pay their taxes and has a baby. the boy has a hatred for the romans.. anyone know??