Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Foam-Ridden Pauldrons Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Foam-Ridden Pauldrons suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Foam-Ridden Pauldrons is part of the transmog set Dorn Defender Armaments (Warrior, Paladin and Death Knight only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 221052 (221047 to 221057) were usually added in the same batch as Foam-Ridden Pauldrons: the same quest line, zone, vendor or reward set.