Primal Gladiator's Kodohide Legguards 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 Legguards
Blizzard numbers items as they are created, so the named items next to ID 115851 (115846 to 115856) were usually added in the same batch as Primal Gladiator's Kodohide Legguards: the same quest line, zone, vendor or reward set.