The first part of this entry derives from Harpokration s.v.
[1] The headword is masculine accusative singular or neuter nominative/accusative singular of the the adjective eu)qu/wros or, as here, eu)quwro/s. It is often (as in Xenophon, below) used adverbially.
[2] Antiphon fr. 40 Sauppe.
[3] Xenophon, Anabasis 2.2.16, where -- just as later in the present entry -- adverbial eu)quwro/n occurs and is (inappropriately) glossed by a scholiast as au)th=| th=| w(/ra|.
[4] Menander Protector fr. 31.2 Blockley (244-245); the same passage is quoted at omicron 119; cf. also kappa 2311. The fragment is unplaced. On the identity of the archer and his victim see alpha 4378 note.