All heraldry from here.
The Hollow Guard. Their sigil is that of 3 conjoined legs on a white field. Their armor is fused shut and completely hollow inside. Runes engraved into the interior of the armor animate the knights, binding the spirits of knights of other orders slain on the battlefield. Animals flee from their presence and their order is considered impolite to bring up in conversation. It is a secret order, consisting of volunteer knights sworn to silence.
The Knight Guard of His Royal Majesty. By far the largest order in the realm, the Knight Guard is comprised mostly of nobility and foot soldiers that show valor in battle. Their crest is a silver dragon on a black field divided diagonally by a purple bar. They are not the best equipped but their training is more than passable. They are respected by the general populous. Their Knight-Commander has slain a dragon and wears armor made of its indestructible scales.
Satyr Knights. Their sigil is a brown goat on a green field. They are not literal satyrs, but are renowned for similar reasons. They each carry a set of panpipes and ride donkeys. They are immune to the inebriating power of alcohol and regularly attempt to see if that immunity is absolute. They are often hired as guards for the few legal brothels in the realm.