FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

hotan ὅταν — hot'-an — from 3753 and 302; whenever (implying hypothesis or more or less uncertainty); also causatively (conjunctionally) inasmuch as:--as long (soon) as, that, + till, when(-soever), while.

see GREEK for 3753

see GREEK for 302