εἴτε (from εἰ τέ), a disjunctive particle, generally doubled: εἴτε . . . εἴτε
a. With the subjunctive we find ἐά_ν τε (ἤν τε, ἄ_ν τε). Hom. has εἴτε . . . εἴτε, but not ἤν τε . . . ἤν τε, with the subjunctive. In the same sense Hom. has ἢ . . . ἤ and ἤτε . . . ἤτε with the subjunctive.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].