: No, Mazzarin was not one of the Nine. The Nine were the 9
: avatara in charge of the Legion during the Great War.
: The Nine were all avatara but not all avatara were
: part of the Nine, but my guess is that at that moment
: there were only 9 avatara. Mazzarin founded the order
: of the avatara that doesn't mean the avatara were
: given the name The Nine all the time just for the 9
: avatara who challange the Fallen during the Great War.
Perhaps, but that's being a little pedantic. We know that, at the time of the Great War, there were nine members of the order of the Avatara, which had become also known as The Nine. We don't know whether membership of the order was limited to nine in earlier ages or not. Nevertheless, although "The Nine" may not strictly have existed in Mazzarin's time, "The Nine" and "The Avatara" were the same order. Similarly, if the term "The Nine" had been used back in the Wolf Age, then, yes, Myrdred would have been one of the Nine.