In the mobile ed course, BI351, Gerald Bray says this:
Gregory is a good example of this. He wrote about Job. One of his biggest books is actually a study of Job. But in the beginning of the book of Job, Jerome had said that “Job was a man.” He puts for this vir—the Latin word, vir, which is “man”—and unus, “one.” Well, of course, we know—and if you know Spanish or Italian or French, you will know—that the word “one” was coming to be used as the indefinite article equivalent to English “a” or “an.” So, all it says is “Job was a man.”
But I've looked at Gregory's commentary and I've looked at the Vulgate and I can't find that. Where does Bray get that information? I'm not great at Latin.