Read from the World of Warcraft client build files.
How Arinor Keeper's Cap Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Arinor Keeper's Cap suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 10 items nearest to Arinor Keeper's Cap (item level 13) in item level among Armor > Leather, Head slot, from item level 19 to 21.
Blizzard numbers items as they are created, so the named items next to ID 240767 (240762 to 240772) were usually added in the same batch as Arinor Keeper's Cap: the same quest line, zone, vendor or reward set.