In Final Fantasy Tactics, Zoidark is summoned by Elidibus, a war mage. Elidibus has the 13th Zoidak stone, the Serpent stone, called Serpentarius. Rather fittingly in FFXIV, Elidibus' red glyph looks like parts of Zodiark's seal from FFXII. So yeah, all of the Ascian Titles of the Convocation of Thirteen are based on the Ivalice games.

This would also be why some people keep saying Elidibus is a snake... and not just because he likes manipulating people. Serpentarius is the name of a snake constellation.