Question

Why does the dispute between Arius and the Bishop of Rome bear his name?

Because Eusebius and Nicomedia and Eusebius of Caesarea proved he was the source of these ideas.
Because he originated the ideas attributed to him.
Because no one outside members of his congregation held the ideas attributed to him.
Because the confrontation with the Bishop of Alexandria placed Arius at the center of the debate.

Answer 1

Because the confrontation with the Bishop of Alexandria placed Arius at the center of the debate. His public dispute made him the focal figure, so the controversy became identified by his name.