First Appearance: TBFGK 28
Hobgobwins are a non-Capital Side. They have been natural allies to Gobwin Knob since at least the reign of King Saline IV, though they eventually defect to Charlescomm in Hvs.tCF 18.
Hobgobwin units are orange skinned humanoids similar in appearance to Gobwins, but considerably bigger (somewhat larger than Men).
Any side allied with Hobgobwins will not be able to ally with Elves or Marbits.LIAB Prologue 24
Hobgobwins can be promoted to be Knights, Heavies, and Warlords.
The naming scheme for hobgobwins seems to be related to slang words that can be found in the urban dictionary.
Hobgobwins may be significantly better fighters and knights than Men are, which would explain why the Knights in Stanley's Service were Hobgobwins.
Real World References
Many creatures in Erfworld are intentionally similar to creatures in Order of the Stick, which is based on Dungeons & Dragons, which has green goblins and orange hobgoblins.