Strong's Greek Dictionary
ἐὰν (ean)
i.e. 1437 and 3361; if not, i.e. unless
i.e. 1437 and 3361; if not, i.e. unless:--X before, but, except, if, no, (if, + whosoever) not. see GREEK for 3361 see GREEK for 1437
James Strong, Strong's Greek Dictionary (1890) — public domain