ὅταν
for ὅτ᾽ ἄν (ὅτε ἄν), adverb of Time, "whenever", Lat. quandocunque, foll. by Subjunct., Hom., etc.; in epic also ὅτε κεν Il.:— εἰς ὅτε κεν "until" such time as.., Od.:— ὅταν τάχιστα, Lat. quum primum, Xen.
An Intermediate Greek-English Lexicon Keyed to Strong's Numbers
ὅταν
for ὅτ᾽ ἄν (ὅτε ἄν), adverb of Time, "whenever", Lat. quandocunque, foll. by Subjunct., Hom., etc.; in epic also ὅτε κεν Il.:— εἰς ὅτε κεν "until" such time as.., Od.:— ὅταν τάχιστα, Lat. quum primum, Xen.