The first author of the question or answer will always be notified of any new comment. There is no need to use @name to notify them. (You may still use it for clarity, if needed; however if only you and the author have been commenting on the post so far, the @name will be automatically removed from the beginning of the comment, as it adds no value.)
(Answer toAnswer to When writing a comment, how do I ensure that the person it is addressed to gets notified?, No. 10)