I was reading this wikipedia article about an elite military force in Egypt which began as an ethnic tribe from the deserts of the eastern Sudan. This tribe was called Medjay. It was mentioned that some of the Medjay had Egyptian names and were depicted as such in wall paintings. Egyptologists say that this was due to the influx of ethnic Egyptians into this group.
While researching on this, I encountered something curious in page 164 of Herodotus' Histories book II.
 The Egyptians are divided into seven distinct classes - these are, the priests, the warriors, the cowherds, the swineherds, the tradesmen, the interpreters, and the boatmen. Their titles indicate their occupations. The warriors consist of Hermotybians and Calascirians, who come from different cantons, the whole of Egypt being parcelled out into districts bearing this name.
He also expanded on the warrior caste in page 168
 The warrior class in Egypt had certain special privileges in which none of the rest of the Egyptians participated, except the priests. In the first place each man had twelve arurae of land assigned him free from tax. (The arura is a square of a hundred Egyptian cubits, the Egyptian cubit being of the same length as the Samian.) All the warriors enjoyed this privilege together, but there were other advantages which came to each in rotation, the same man never obtaining them twice. A thousand Calascirians, and the same number of Hermotybians, formed in alternate years the bodyguard of the king; and during their year of service these persons, besides their arurae, received a daily portion of meat and drink, consisting of five pounds of baked bread, two pounds of beef, and four cups of wine.
He described them as Hermotybians and Calascirians. What are the meanings of these names in the greek language?
Are these groups the same as the Medjay?
As for the Medjay, I want to know if it has become possible for archeologists to locate their modern descendants.