Where do the heralds get their names?

Where do the heralds get their names?

The heralds at the College of Arms can be divided into three categories. There are three Kings of Arms, who are Garter, the most important, then Clarenceux King of Arms with jurisdiction over the southern half of England and Wales south of the Trent, and Norroy and Ulster King of Arms with jurisdiction over the area of England and Wales north of the Trent and over Northern Ireland. And they both date from the early medieval times. There are then six heralds, who take their names in the main from royal dukedoms assimilated by the Crown during the medieval times, with the exception of Windsor Herald, who of course is named after the castle. At the bottom of the hierarchy are four pursuivants, who take their names from royal badges. Two, namely Portcullis and Rouge Dragon, take their names from badges used by Henry VII. And two, namely Rouge Croix and Bluemantle, take their names from badges associated with the Order of the Garter.