Primal Gladiator's Kodohide Robes is part of the transmog set Primal Gladiator's Dragonhide Armor (Druid only), which the Appearances collection lists in 2 versions. The other 16 pieces:
Items Numbered Next to Primal Gladiator's Kodohide Robes
Blizzard numbers items as they are created, so the named items next to ID 115852 (115847 to 115857) were usually added in the same batch as Primal Gladiator's Kodohide Robes: the same quest line, zone, vendor or reward set.