φιλοβασιλισταί
From LSJ
καὶ παρὰ δύναμιν τολμηταὶ καὶ παρὰ γνώμην κινδυνευταὶ καὶ ἐν τοῖς δεινοῖς εὐέλπιδες → they are bold beyond their strength, venturesome beyond their better judgment, and sanguine in the face of dangers
English (LSJ)
οἱ, A 'the King's Own', regiment in Egypt, UPZ161.4 (ii B. C.), PAmh.2.39.12 (ii B. C.).