The twin goblins are the oldest, they got some parts from bretonnia, 4th edition goblin wolf riders, gor shields and random bits. The hobgoblin is made with zombie legs, goblin wolf raider torso, empire arms and gnoblar head. The squat orc is made with skaven body, orc head and gor arms. The bugbear is an orc with ungor arms and a goblin head with a new nose.
As a bonus, a green skin hobgoblin made with empire, elf and goblin parts.