Yes, this is a new AR inspired band name.
Also a thread topic I pondered. I remember Zreef posting many pictures before of him playing 3v3 games of AR using his Anum cohort. It was basically made up of the only way that you could build a Bestiae cohort with 3 models and 3 cards that I could think of, at the time - Anum, Leo, Sereqet. The other beasts were all 2 stages and so wouldn't fit, but those two were single stage.
Since then, we have gotten two new beasts, both horses, and both single stage. So a new Bestiae cohort option which could be quite cool-looking would be Anum and the Horses. Anum, Caho-Ta, Dextarius. Hoof to face.
Zreef's early configuration is probably more environmentally appropriate, since Anum is a Morituri and thus desert-based, and I can imagine both lions and scorpions in the desert quite easily. The horses seem more northern. But I like that you can have two of the same animal this way.