Twenty years ago, there appeared the proposal of Michele Renee Salzman to identify the otherwise unknown, but certainly Christian recipient of the Codex-Calendar of 354 with one of the close relatives of Quintus Aurelius Symmachus. The proposal itself surprisingly passed without too much concern.
In this article, however, it is recommended to treat it as the least preferable possibility, on the grounds of complete absence of any other piece of evidence of such a curious situation.