ἐάν
Etym. compounded of εἰ ἄν
Etym. ἐα?ν contracts into ἤν and ἄν
I. "if haply", if, followed by subj. (whereas εἰ is foll. by ind. or opt.), epic εἴ κε, αἴ κε.
II. in NTest. ἐάν is used just like the adverb ἄν after relative Pronouns and Conjunctions, as ὃς ἐάν "whosoever", ὅσος ἐάν, ὅστις ἐάν, ὅπου ἐάν, etc.